- published: 19 Mar 2012
- views: 82135
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Continuing the A Level revision series covering, fields, the gravitational field, the gravitational constant (G), gravitational potential energy, gravitational potential, the velocity and period of masses in orbit, geosynchronous satellites, Kepler's laws and escape velocity
A Level Physics
Doodle Science teaches you high school and College physics in a less boring way in almost no time!
Follow me: https://twitter.com/DoodleSci
You can support me at: https://patreon.com/doodlescience
Script:
A gravitational field is a region around one mass, which affects other nearby masses. It is very weak however which is why the effect is only significant on large objects like the Earth. We can represent the Earth’s gravitational field by drawing field lines showing the direction of the gravitational force on masses in the field. In this case the field is radial and equally spread around the earth. On the surface of the earth the gravitational field is approximately uniform because the field lines are virtually pointing in the same direction and are equally spaced. This is why we assume the acceleration due to gravity is a constant of 9.81m/s^2 because the change at small vertical heights is negligible.
Newton’s law of gravitation states that all masses attract each other with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between the two centres of mass. This gives us the equation F= - GMm/r^2. Where G is the universal gravitational constant of 6.67x10^-11; M is the mass of the larger body; m is the mass of the smaller body; and r is the distance between the centres of mass of the two bodies. The minus sign simply refers to the to the fact that the force is attractive. For example, two bodies, one of mass 6kg and the other of mass 20kg are placed 50cm apart. From this we can work out the gravitational force acting on each object as 3.20x10^-8N. The force acting on each body is equal because they are attracted to each other.
The gravitational field strength is the force per unit mass at a point in a gravitational field. For a uniform field the equation is F/m, where F is the force experienced by the body and m is the mass of the body. For a radial field, the gravitational field strength obeys an inverse square law. The equation for it is g=GM/r^2. You can see how the gravitational field strength would decrease the further you were from the centre of the body producing the field.
This formula can be used to work out the masses of celestial bodies. For example, given that the gravitational field strength on the earth’s surface is 9.81 N/kg and the radius of the earth is 6400km, we can work out the mass of the earth to be 6.02x10^24kg.
When considering planetary motion, the gravitational force acting on the body orbiting is equal to the centripetal force because the force acts perpendicular to the direction of motion. By equating the two formulas and using the formula for the speed of an object in circular motion we get the equation T^2=(4π^2/GM)r^3. Where T is the orbital period in seconds and r is the distance between the centres of mass of the orbiting body and body being orbited. This equation shows Kepler’s third law which states that the T^2 is directly proportional to r^3. This also suggests that for a set of celestial bodies (e.g. the planets of our solar system) orbiting the same large body (e.g. the sun), T^2/r^3 is a constant and is equal for all the celestial bodies.
For example, given that it takes 365 days for the Earth to orbit the sun and that the distance of the earth from the centre of the sun is 1.5x10^11m. We can work out the mass of the sun to be about 2.00x10^30kg.
Given that the orbital period of mars is 687 days, we can use the Earth’s orbital characteristics to work how far Mars is from the centre of the Sun as being 2.29x10^11m.
A geostationary orbit is an orbit around the Earth whose orbital period is 24 hours. They are located above the equator and are always vertically above the same point on the surface of the Earth. This makes them useful for TV satellites because the dishes can be pointed to a fixed point in the sky. Which is quite convenient I’d say.
References:
1. CGP AS & A2 Physics for OCR A, ISBN: 9781847624192
- published: 01 Feb 2016
- views: 7129
025 - Gravitational Field Strength
In this video Paul Andersen explains how the gravitational field strength is directly related to the mass of the object and indirectly related to the square of the distance from the center of mass. The equation for gravitational field strength was discovered by Sir Isaac Newton and contains a gravitational constant.
Do you speak another language? Help me translate my videos:
http://www.bozemanscience.com/translations/
Music Attribution
Title: String Theory
Artist: Herman Jolly
http://sunsetvalley.bandcamp.com/track/string-theory
All of the images are licensed under creative commons and public domain licensing:
"File:GRACE Globe Animation.gif." Wikipedia, the Free Encyclopedia. Accessed May 22, 2014. http://en.wikipedia.org/wiki/File:GRACE_globe_animation.gif.
"Gravity and Orbits." PhET. Accessed May 22, 2014. http://phet.colorado.edu/en/simulation/gravity-and-orbits.
Sjlegg. English: Gravitational Field Lines and Equipotentials (red) around the Earth., May 9, 2009. Own work. http://commons.wikimedia.org/wiki/File:Gravitational_field_Earth_lines_equipotentials.svg.
- published: 22 Jun 2014
- views: 28697
A summary of the key points for gravitational fields: Force, Field Strength, Potential Energy, Potential, Radial / Uniform.
- published: 04 Jun 2014
- views: 4460
Explains how lower case "g" is both the acceleration due to gravity and also the gravitational field strength.
- published: 06 Sep 2009
- views: 19727
This animation simulates the gravitational field near a planetary body as it is warped by an orbiting satellite. The grid represents test particles and the vectors represent the acceleration of the test particle computed using Newton's law for gravity, F = GMm/r^2. I started with the true mass of the earth and moon, but increased the mass of the moon by a factor of 10 and decreased the distance from the earth to the moon substantially to amplify the visual effect. The diameter of the earth as compared to the moon is accurate, but the distance between them is not. The first half of this animation shows the satellite with a fixed distance orbit and the second half with the orbiting distance decreasing as a quadratic function according to the kinematics of projectile motion.
Near the end, the satellite appears to slow down, but it shouldn't according to my program. The best I can figure whats happening is that near the end the distance between the masses is decreasing faster than the tangential velocity is increasing so its just being out passed. For all I know that might be how it really would look from space!
This, like my magnetic field animation, was written in php. I use php because the GD libraries make it so easy to convert the mathematical model to an image!
In a future animation I'm going to attempt to simulate the merging of two black holes including the effects of general relativity. The music is Alpha Animal by Denny Schneidemesser.
Please rate and comment!
- published: 23 Aug 2010
- views: 35411
Donate here: http://www.aklectures.com/donate.php
Website video link: http://www.aklectures.com/lecture/gravitational-field
Facebook link: https://www.facebook.com/aklectures
Website link: http://www.aklectures.com
- published: 14 Aug 2013
- views: 1514
Help Keep PTSOS Going, Click Here: https://www.gofundme.com/ptsos
Dan Burns explains his space-time warping demo at a PTSOS workshop at Los Gatos High School, on March 10, 2012. Thanks to Shannon Range from the Gravity Probe B program for creating the original demonstration which he shared with Dan in 2004.
Information on how to make your own Spacetime Simulator can be found here:
http://prettygoodphysics.wikispaces.com/PGP-Modern+Physics
- published: 10 Mar 2012
- views: 29591311
A brief introduction to gravitational fields for beginning high school students. For more information, check out http://www.aplusphysics.com.
- published: 27 Nov 2011
- views: 12432
Gravitational field
In physics, a gravitational field is a model used to explain the influence that a massive body extends into the space around itself, producing a force on another massive body. Thus, a gravitational field is used to explain gravitational phenomena, and is measured in newtons per kilogram (N/kg). In its original concept, gravity was a force between point masses. Following Newton, Laplace attempted to model gravity as some kind of radiation field or fluid, and since the 19th century explanations for gravity have usually been taught in terms of a field model, rather than a point attraction.
In a field model, rather than two particles attracting each other, the particles distort spacetime via their mass, and this distortion is what is perceived and measured as a "force". In such a model one states that matter moves in certain ways in response to the curvature of spacetime, and that there is either no gravitational force, or that gravity is a fictitious force.
Classical mechanics
This page contains text from Wikipedia, the Free Encyclopedia -
https://wn.com/Gravitational_field
This article is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License, which means that you can copy and modify it as long as the entire work (including additions) remains under this license.
This article is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License, which means that you can copy and modify it as long as the entire work (including additions) remains under this license.
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28:16Gravitational Fields - A Level Physics
Gravitational Fields - A Level PhysicsGravitational Fields - A Level Physics
Continuing the A Level revision series covering, fields, the gravitational field, the gravitational constant (G), gravitational potential energy, gravitational potential, the velocity and period of masses in orbit, geosynchronous satellites, Kepler's laws and escape velocity -
5:00Gravitational Fields | A-Level Physics | Doodle Science
Gravitational Fields | A-Level Physics | Doodle ScienceGravitational Fields | A-Level Physics | Doodle Science
A Level Physics Doodle Science teaches you high school and College physics in a less boring way in almost no time! Follow me: https://twitter.com/DoodleSci You can support me at: https://patreon.com/doodlescience Script: A gravitational field is a region around one mass, which affects other nearby masses. It is very weak however which is why the effect is only significant on large objects like the Earth. We can represent the Earth’s gravitational field by drawing field lines showing the direction of the gravitational force on masses in the field. In this case the field is radial and equally spread around the earth. On the surface of the earth the gravitational field is approximately uniform because the field lines are virtually pointing in the same direction and are equally spaced. This is why we assume the acceleration due to gravity is a constant of 9.81m/s^2 because the change at small vertical heights is negligible. Newton’s law of gravitation states that all masses attract each other with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between the two centres of mass. This gives us the equation F= - GMm/r^2. Where G is the universal gravitational constant of 6.67x10^-11; M is the mass of the larger body; m is the mass of the smaller body; and r is the distance between the centres of mass of the two bodies. The minus sign simply refers to the to the fact that the force is attractive. For example, two bodies, one of mass 6kg and the other of mass 20kg are placed 50cm apart. From this we can work out the gravitational force acting on each object as 3.20x10^-8N. The force acting on each body is equal because they are attracted to each other. The gravitational field strength is the force per unit mass at a point in a gravitational field. For a uniform field the equation is F/m, where F is the force experienced by the body and m is the mass of the body. For a radial field, the gravitational field strength obeys an inverse square law. The equation for it is g=GM/r^2. You can see how the gravitational field strength would decrease the further you were from the centre of the body producing the field. This formula can be used to work out the masses of celestial bodies. For example, given that the gravitational field strength on the earth’s surface is 9.81 N/kg and the radius of the earth is 6400km, we can work out the mass of the earth to be 6.02x10^24kg. When considering planetary motion, the gravitational force acting on the body orbiting is equal to the centripetal force because the force acts perpendicular to the direction of motion. By equating the two formulas and using the formula for the speed of an object in circular motion we get the equation T^2=(4π^2/GM)r^3. Where T is the orbital period in seconds and r is the distance between the centres of mass of the orbiting body and body being orbited. This equation shows Kepler’s third law which states that the T^2 is directly proportional to r^3. This also suggests that for a set of celestial bodies (e.g. the planets of our solar system) orbiting the same large body (e.g. the sun), T^2/r^3 is a constant and is equal for all the celestial bodies. For example, given that it takes 365 days for the Earth to orbit the sun and that the distance of the earth from the centre of the sun is 1.5x10^11m. We can work out the mass of the sun to be about 2.00x10^30kg. Given that the orbital period of mars is 687 days, we can use the Earth’s orbital characteristics to work how far Mars is from the centre of the Sun as being 2.29x10^11m. A geostationary orbit is an orbit around the Earth whose orbital period is 24 hours. They are located above the equator and are always vertically above the same point on the surface of the Earth. This makes them useful for TV satellites because the dishes can be pointed to a fixed point in the sky. Which is quite convenient I’d say. References: 1. CGP AS & A2 Physics for OCR A, ISBN: 9781847624192 -
5:38Gravitational Field Strength
Gravitational Field StrengthGravitational Field Strength
025 - Gravitational Field Strength In this video Paul Andersen explains how the gravitational field strength is directly related to the mass of the object and indirectly related to the square of the distance from the center of mass. The equation for gravitational field strength was discovered by Sir Isaac Newton and contains a gravitational constant. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: "File:GRACE Globe Animation.gif." Wikipedia, the Free Encyclopedia. Accessed May 22, 2014. http://en.wikipedia.org/wiki/File:GRACE_globe_animation.gif. "Gravity and Orbits." PhET. Accessed May 22, 2014. http://phet.colorado.edu/en/simulation/gravity-and-orbits. Sjlegg. English: Gravitational Field Lines and Equipotentials (red) around the Earth., May 9, 2009. Own work. http://commons.wikimedia.org/wiki/File:Gravitational_field_Earth_lines_equipotentials.svg. -
11:26A Level Physics: AQA Unit 4: Gravitational Fields
A Level Physics: AQA Unit 4: Gravitational FieldsA Level Physics: AQA Unit 4: Gravitational Fields
A summary of the key points for gravitational fields: Force, Field Strength, Potential Energy, Potential, Radial / Uniform. -
7:50Gravitational Fields
Gravitational FieldsGravitational Fields
Explains how lower case "g" is both the acceleration due to gravity and also the gravitational field strength. -
2:25Gravitational Fields
Gravitational Fields -
1:01Gravitational Field Animation (Equivalence Principle)
Gravitational Field Animation (Equivalence Principle)Gravitational Field Animation (Equivalence Principle)
This animation simulates the gravitational field near a planetary body as it is warped by an orbiting satellite. The grid represents test particles and the vectors represent the acceleration of the test particle computed using Newton's law for gravity, F = GMm/r^2. I started with the true mass of the earth and moon, but increased the mass of the moon by a factor of 10 and decreased the distance from the earth to the moon substantially to amplify the visual effect. The diameter of the earth as compared to the moon is accurate, but the distance between them is not. The first half of this animation shows the satellite with a fixed distance orbit and the second half with the orbiting distance decreasing as a quadratic function according to the kinematics of projectile motion. Near the end, the satellite appears to slow down, but it shouldn't according to my program. The best I can figure whats happening is that near the end the distance between the masses is decreasing faster than the tangential velocity is increasing so its just being out passed. For all I know that might be how it really would look from space! This, like my magnetic field animation, was written in php. I use php because the GD libraries make it so easy to convert the mathematical model to an image! In a future animation I'm going to attempt to simulate the merging of two black holes including the effects of general relativity. The music is Alpha Animal by Denny Schneidemesser. Please rate and comment! -
7:31Gravitational Field
Gravitational FieldGravitational Field
Donate here: http://www.aklectures.com/donate.php Website video link: http://www.aklectures.com/lecture/gravitational-field Facebook link: https://www.facebook.com/aklectures Website link: http://www.aklectures.com -
9:58Gravity Visualized
Gravity VisualizedGravity Visualized
Help Keep PTSOS Going, Click Here: https://www.gofundme.com/ptsos Dan Burns explains his space-time warping demo at a PTSOS workshop at Los Gatos High School, on March 10, 2012. Thanks to Shannon Range from the Gravity Probe B program for creating the original demonstration which he shared with Dan in 2004. Information on how to make your own Spacetime Simulator can be found here: http://prettygoodphysics.wikispaces.com/PGP-Modern+Physics -
9:35High School Physics - Gravitational Fields
High School Physics - Gravitational FieldsHigh School Physics - Gravitational Fields
A brief introduction to gravitational fields for beginning high school students. For more information, check out http://www.aplusphysics.com.
-
Gravitational Fields - A Level Physics
Continuing the A Level revision series covering, fields, the gravitational field, the gravitational constant (G), gravitational potential energy, gravitational potential, the velocity and period of masses in orbit, geosynchronous satellites, Kepler's laws and escape velocity
published: 19 Mar 2012 -
Gravitational Fields | A-Level Physics | Doodle Science
A Level Physics Doodle Science teaches you high school and College physics in a less boring way in almost no time! Follow me: https://twitter.com/DoodleSci You can support me at: https://patreon.com/doodlescience Script: A gravitational field is a region around one mass, which affects other nearby masses. It is very weak however which is why the effect is only significant on large objects like the Earth. We can represent the Earth’s gravitational field by drawing field lines showing the direction of the gravitational force on masses in the field. In this case the field is radial and equally spread around the earth. On the surface of the earth the gravitational field is approximately uniform because the field lines are virtually pointing in the same direction and are equally spaced. Th...
published: 01 Feb 2016 -
Gravitational Field Strength
025 - Gravitational Field Strength In this video Paul Andersen explains how the gravitational field strength is directly related to the mass of the object and indirectly related to the square of the distance from the center of mass. The equation for gravitational field strength was discovered by Sir Isaac Newton and contains a gravitational constant. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: "File:GRACE Globe Animation.gif." Wikipedia, the Free Encyclopedia. Accessed May 22, 2014. http://en.wikipedia.org/wiki/File:GRACE_globe_ani...
published: 22 Jun 2014 -
A Level Physics: AQA Unit 4: Gravitational Fields
A summary of the key points for gravitational fields: Force, Field Strength, Potential Energy, Potential, Radial / Uniform.
published: 04 Jun 2014 -
Gravitational Fields
Explains how lower case "g" is both the acceleration due to gravity and also the gravitational field strength.
published: 06 Sep 2009 -
-
Gravitational Field Animation (Equivalence Principle)
This animation simulates the gravitational field near a planetary body as it is warped by an orbiting satellite. The grid represents test particles and the vectors represent the acceleration of the test particle computed using Newton's law for gravity, F = GMm/r^2. I started with the true mass of the earth and moon, but increased the mass of the moon by a factor of 10 and decreased the distance from the earth to the moon substantially to amplify the visual effect. The diameter of the earth as compared to the moon is accurate, but the distance between them is not. The first half of this animation shows the satellite with a fixed distance orbit and the second half with the orbiting distance decreasing as a quadratic function according to the kinematics of projectile motion. Near the end, th...
published: 23 Aug 2010 -
Gravitational Field
Donate here: http://www.aklectures.com/donate.php Website video link: http://www.aklectures.com/lecture/gravitational-field Facebook link: https://www.facebook.com/aklectures Website link: http://www.aklectures.com
published: 14 Aug 2013 -
Gravity Visualized
Help Keep PTSOS Going, Click Here: https://www.gofundme.com/ptsos Dan Burns explains his space-time warping demo at a PTSOS workshop at Los Gatos High School, on March 10, 2012. Thanks to Shannon Range from the Gravity Probe B program for creating the original demonstration which he shared with Dan in 2004. Information on how to make your own Spacetime Simulator can be found here: http://prettygoodphysics.wikispaces.com/PGP-Modern+Physics
published: 10 Mar 2012 -
High School Physics - Gravitational Fields
A brief introduction to gravitational fields for beginning high school students. For more information, check out http://www.aplusphysics.com.
published: 27 Nov 2011
Gravitational Fields - A Level Physics
- Order: Reorder
- Duration: 28:16
- Updated: 19 Mar 2012
- views: 82135
Continuing the A Level revision series covering, fields, the gravitational field, the gravitational constant (G), gravitational potential energy, gravitational ...
Continuing the A Level revision series covering, fields, the gravitational field, the gravitational constant (G), gravitational potential energy, gravitational potential, the velocity and period of masses in orbit, geosynchronous satellites, Kepler's laws and escape velocity
wn.com/Gravitational Fields A Level Physics
Continuing the A Level revision series covering, fields, the gravitational field, the gravitational constant (G), gravitational potential energy, gravitational potential, the velocity and period of masses in orbit, geosynchronous satellites, Kepler's laws and escape velocity
- published: 19 Mar 2012
- views: 82135
Gravitational Fields | A-Level Physics | Doodle Science
- Order: Reorder
- Duration: 5:00
- Updated: 01 Feb 2016
- views: 7129
A Level Physics
Doodle Science teaches you high school and College physics in a less boring way in almost no time!
Follow me: https://twitter.com/DoodleSci
Y...
A Level Physics
Doodle Science teaches you high school and College physics in a less boring way in almost no time!
Follow me: https://twitter.com/DoodleSci
You can support me at: https://patreon.com/doodlescience
Script:
A gravitational field is a region around one mass, which affects other nearby masses. It is very weak however which is why the effect is only significant on large objects like the Earth. We can represent the Earth’s gravitational field by drawing field lines showing the direction of the gravitational force on masses in the field. In this case the field is radial and equally spread around the earth. On the surface of the earth the gravitational field is approximately uniform because the field lines are virtually pointing in the same direction and are equally spaced. This is why we assume the acceleration due to gravity is a constant of 9.81m/s^2 because the change at small vertical heights is negligible.
Newton’s law of gravitation states that all masses attract each other with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between the two centres of mass. This gives us the equation F= - GMm/r^2. Where G is the universal gravitational constant of 6.67x10^-11; M is the mass of the larger body; m is the mass of the smaller body; and r is the distance between the centres of mass of the two bodies. The minus sign simply refers to the to the fact that the force is attractive. For example, two bodies, one of mass 6kg and the other of mass 20kg are placed 50cm apart. From this we can work out the gravitational force acting on each object as 3.20x10^-8N. The force acting on each body is equal because they are attracted to each other.
The gravitational field strength is the force per unit mass at a point in a gravitational field. For a uniform field the equation is F/m, where F is the force experienced by the body and m is the mass of the body. For a radial field, the gravitational field strength obeys an inverse square law. The equation for it is g=GM/r^2. You can see how the gravitational field strength would decrease the further you were from the centre of the body producing the field.
This formula can be used to work out the masses of celestial bodies. For example, given that the gravitational field strength on the earth’s surface is 9.81 N/kg and the radius of the earth is 6400km, we can work out the mass of the earth to be 6.02x10^24kg.
When considering planetary motion, the gravitational force acting on the body orbiting is equal to the centripetal force because the force acts perpendicular to the direction of motion. By equating the two formulas and using the formula for the speed of an object in circular motion we get the equation T^2=(4π^2/GM)r^3. Where T is the orbital period in seconds and r is the distance between the centres of mass of the orbiting body and body being orbited. This equation shows Kepler’s third law which states that the T^2 is directly proportional to r^3. This also suggests that for a set of celestial bodies (e.g. the planets of our solar system) orbiting the same large body (e.g. the sun), T^2/r^3 is a constant and is equal for all the celestial bodies.
For example, given that it takes 365 days for the Earth to orbit the sun and that the distance of the earth from the centre of the sun is 1.5x10^11m. We can work out the mass of the sun to be about 2.00x10^30kg.
Given that the orbital period of mars is 687 days, we can use the Earth’s orbital characteristics to work how far Mars is from the centre of the Sun as being 2.29x10^11m.
A geostationary orbit is an orbit around the Earth whose orbital period is 24 hours. They are located above the equator and are always vertically above the same point on the surface of the Earth. This makes them useful for TV satellites because the dishes can be pointed to a fixed point in the sky. Which is quite convenient I’d say.
References:
1. CGP AS & A2 Physics for OCR A, ISBN: 9781847624192
wn.com/Gravitational Fields | A Level Physics | Doodle Science
A Level Physics
Doodle Science teaches you high school and College physics in a less boring way in almost no time!
Follow me: https://twitter.com/DoodleSci
You can support me at: https://patreon.com/doodlescience
Script:
A gravitational field is a region around one mass, which affects other nearby masses. It is very weak however which is why the effect is only significant on large objects like the Earth. We can represent the Earth’s gravitational field by drawing field lines showing the direction of the gravitational force on masses in the field. In this case the field is radial and equally spread around the earth. On the surface of the earth the gravitational field is approximately uniform because the field lines are virtually pointing in the same direction and are equally spaced. This is why we assume the acceleration due to gravity is a constant of 9.81m/s^2 because the change at small vertical heights is negligible.
Newton’s law of gravitation states that all masses attract each other with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between the two centres of mass. This gives us the equation F= - GMm/r^2. Where G is the universal gravitational constant of 6.67x10^-11; M is the mass of the larger body; m is the mass of the smaller body; and r is the distance between the centres of mass of the two bodies. The minus sign simply refers to the to the fact that the force is attractive. For example, two bodies, one of mass 6kg and the other of mass 20kg are placed 50cm apart. From this we can work out the gravitational force acting on each object as 3.20x10^-8N. The force acting on each body is equal because they are attracted to each other.
The gravitational field strength is the force per unit mass at a point in a gravitational field. For a uniform field the equation is F/m, where F is the force experienced by the body and m is the mass of the body. For a radial field, the gravitational field strength obeys an inverse square law. The equation for it is g=GM/r^2. You can see how the gravitational field strength would decrease the further you were from the centre of the body producing the field.
This formula can be used to work out the masses of celestial bodies. For example, given that the gravitational field strength on the earth’s surface is 9.81 N/kg and the radius of the earth is 6400km, we can work out the mass of the earth to be 6.02x10^24kg.
When considering planetary motion, the gravitational force acting on the body orbiting is equal to the centripetal force because the force acts perpendicular to the direction of motion. By equating the two formulas and using the formula for the speed of an object in circular motion we get the equation T^2=(4π^2/GM)r^3. Where T is the orbital period in seconds and r is the distance between the centres of mass of the orbiting body and body being orbited. This equation shows Kepler’s third law which states that the T^2 is directly proportional to r^3. This also suggests that for a set of celestial bodies (e.g. the planets of our solar system) orbiting the same large body (e.g. the sun), T^2/r^3 is a constant and is equal for all the celestial bodies.
For example, given that it takes 365 days for the Earth to orbit the sun and that the distance of the earth from the centre of the sun is 1.5x10^11m. We can work out the mass of the sun to be about 2.00x10^30kg.
Given that the orbital period of mars is 687 days, we can use the Earth’s orbital characteristics to work how far Mars is from the centre of the Sun as being 2.29x10^11m.
A geostationary orbit is an orbit around the Earth whose orbital period is 24 hours. They are located above the equator and are always vertically above the same point on the surface of the Earth. This makes them useful for TV satellites because the dishes can be pointed to a fixed point in the sky. Which is quite convenient I’d say.
References:
1. CGP AS & A2 Physics for OCR A, ISBN: 9781847624192
- published: 01 Feb 2016
- views: 7129
Gravitational Field Strength
- Order: Reorder
- Duration: 5:38
- Updated: 22 Jun 2014
- views: 28697
025 - Gravitational Field Strength
In this video Paul Andersen explains how the gravitational field strength is directly related to the mass of the object and ...
025 - Gravitational Field Strength
In this video Paul Andersen explains how the gravitational field strength is directly related to the mass of the object and indirectly related to the square of the distance from the center of mass. The equation for gravitational field strength was discovered by Sir Isaac Newton and contains a gravitational constant.
Do you speak another language? Help me translate my videos:
http://www.bozemanscience.com/translations/
Music Attribution
Title: String Theory
Artist: Herman Jolly
http://sunsetvalley.bandcamp.com/track/string-theory
All of the images are licensed under creative commons and public domain licensing:
"File:GRACE Globe Animation.gif." Wikipedia, the Free Encyclopedia. Accessed May 22, 2014. http://en.wikipedia.org/wiki/File:GRACE_globe_animation.gif.
"Gravity and Orbits." PhET. Accessed May 22, 2014. http://phet.colorado.edu/en/simulation/gravity-and-orbits.
Sjlegg. English: Gravitational Field Lines and Equipotentials (red) around the Earth., May 9, 2009. Own work. http://commons.wikimedia.org/wiki/File:Gravitational_field_Earth_lines_equipotentials.svg.
wn.com/Gravitational Field Strength
025 - Gravitational Field Strength
In this video Paul Andersen explains how the gravitational field strength is directly related to the mass of the object and indirectly related to the square of the distance from the center of mass. The equation for gravitational field strength was discovered by Sir Isaac Newton and contains a gravitational constant.
Do you speak another language? Help me translate my videos:
http://www.bozemanscience.com/translations/
Music Attribution
Title: String Theory
Artist: Herman Jolly
http://sunsetvalley.bandcamp.com/track/string-theory
All of the images are licensed under creative commons and public domain licensing:
"File:GRACE Globe Animation.gif." Wikipedia, the Free Encyclopedia. Accessed May 22, 2014. http://en.wikipedia.org/wiki/File:GRACE_globe_animation.gif.
"Gravity and Orbits." PhET. Accessed May 22, 2014. http://phet.colorado.edu/en/simulation/gravity-and-orbits.
Sjlegg. English: Gravitational Field Lines and Equipotentials (red) around the Earth., May 9, 2009. Own work. http://commons.wikimedia.org/wiki/File:Gravitational_field_Earth_lines_equipotentials.svg.
- published: 22 Jun 2014
- views: 28697
A Level Physics: AQA Unit 4: Gravitational Fields
- Order: Reorder
- Duration: 11:26
- Updated: 04 Jun 2014
- views: 4460
A summary of the key points for gravitational fields: Force, Field Strength, Potential Energy, Potential, Radial / Uniform.
A summary of the key points for gravitational fields: Force, Field Strength, Potential Energy, Potential, Radial / Uniform.
wn.com/A Level Physics Aqa Unit 4 Gravitational Fields
A summary of the key points for gravitational fields: Force, Field Strength, Potential Energy, Potential, Radial / Uniform.
- published: 04 Jun 2014
- views: 4460
Gravitational Fields
- Order: Reorder
- Duration: 7:50
- Updated: 06 Sep 2009
- views: 19727
Explains how lower case "g" is both the acceleration due to gravity and also the gravitational field strength.
Explains how lower case "g" is both the acceleration due to gravity and also the gravitational field strength.
wn.com/Gravitational Fields
Explains how lower case "g" is both the acceleration due to gravity and also the gravitational field strength.
- published: 06 Sep 2009
- views: 19727
Gravitational Fields
- Order: Reorder
- Duration: 2:25
- Updated: 09 Sep 2010
- views: 4295
Gravitational Field Animation (Equivalence Principle)
- Order: Reorder
- Duration: 1:01
- Updated: 23 Aug 2010
- views: 35411
This animation simulates the gravitational field near a planetary body as it is warped by an orbiting satellite. The grid represents test particles and the vect...
This animation simulates the gravitational field near a planetary body as it is warped by an orbiting satellite. The grid represents test particles and the vectors represent the acceleration of the test particle computed using Newton's law for gravity, F = GMm/r^2. I started with the true mass of the earth and moon, but increased the mass of the moon by a factor of 10 and decreased the distance from the earth to the moon substantially to amplify the visual effect. The diameter of the earth as compared to the moon is accurate, but the distance between them is not. The first half of this animation shows the satellite with a fixed distance orbit and the second half with the orbiting distance decreasing as a quadratic function according to the kinematics of projectile motion.
Near the end, the satellite appears to slow down, but it shouldn't according to my program. The best I can figure whats happening is that near the end the distance between the masses is decreasing faster than the tangential velocity is increasing so its just being out passed. For all I know that might be how it really would look from space!
This, like my magnetic field animation, was written in php. I use php because the GD libraries make it so easy to convert the mathematical model to an image!
In a future animation I'm going to attempt to simulate the merging of two black holes including the effects of general relativity. The music is Alpha Animal by Denny Schneidemesser.
Please rate and comment!
wn.com/Gravitational Field Animation (Equivalence Principle)
This animation simulates the gravitational field near a planetary body as it is warped by an orbiting satellite. The grid represents test particles and the vectors represent the acceleration of the test particle computed using Newton's law for gravity, F = GMm/r^2. I started with the true mass of the earth and moon, but increased the mass of the moon by a factor of 10 and decreased the distance from the earth to the moon substantially to amplify the visual effect. The diameter of the earth as compared to the moon is accurate, but the distance between them is not. The first half of this animation shows the satellite with a fixed distance orbit and the second half with the orbiting distance decreasing as a quadratic function according to the kinematics of projectile motion.
Near the end, the satellite appears to slow down, but it shouldn't according to my program. The best I can figure whats happening is that near the end the distance between the masses is decreasing faster than the tangential velocity is increasing so its just being out passed. For all I know that might be how it really would look from space!
This, like my magnetic field animation, was written in php. I use php because the GD libraries make it so easy to convert the mathematical model to an image!
In a future animation I'm going to attempt to simulate the merging of two black holes including the effects of general relativity. The music is Alpha Animal by Denny Schneidemesser.
Please rate and comment!
- published: 23 Aug 2010
- views: 35411
Gravitational Field
- Order: Reorder
- Duration: 7:31
- Updated: 14 Aug 2013
- views: 1514
Donate here: http://www.aklectures.com/donate.php
Website video link: http://www.aklectures.com/lecture/gravitational-field
Facebook link: https://www.facebook....
Donate here: http://www.aklectures.com/donate.php
Website video link: http://www.aklectures.com/lecture/gravitational-field
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Website link: http://www.aklectures.com
wn.com/Gravitational Field
Donate here: http://www.aklectures.com/donate.php
Website video link: http://www.aklectures.com/lecture/gravitational-field
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- published: 14 Aug 2013
- views: 1514
Gravity Visualized
- Order: Reorder
- Duration: 9:58
- Updated: 10 Mar 2012
- views: 29591311
Help Keep PTSOS Going, Click Here: https://www.gofundme.com/ptsos
Dan Burns explains his space-time warping demo at a PTSOS workshop at Los Gatos High School, o...
Help Keep PTSOS Going, Click Here: https://www.gofundme.com/ptsos
Dan Burns explains his space-time warping demo at a PTSOS workshop at Los Gatos High School, on March 10, 2012. Thanks to Shannon Range from the Gravity Probe B program for creating the original demonstration which he shared with Dan in 2004.
Information on how to make your own Spacetime Simulator can be found here:
http://prettygoodphysics.wikispaces.com/PGP-Modern+Physics
wn.com/Gravity Visualized
Help Keep PTSOS Going, Click Here: https://www.gofundme.com/ptsos
Dan Burns explains his space-time warping demo at a PTSOS workshop at Los Gatos High School, on March 10, 2012. Thanks to Shannon Range from the Gravity Probe B program for creating the original demonstration which he shared with Dan in 2004.
Information on how to make your own Spacetime Simulator can be found here:
http://prettygoodphysics.wikispaces.com/PGP-Modern+Physics
- published: 10 Mar 2012
- views: 29591311
High School Physics - Gravitational Fields
- Order: Reorder
- Duration: 9:35
- Updated: 27 Nov 2011
- views: 12432
A brief introduction to gravitational fields for beginning high school students. For more information, check out http://www.aplusphysics.com.
A brief introduction to gravitational fields for beginning high school students. For more information, check out http://www.aplusphysics.com.
wn.com/High School Physics Gravitational Fields
A brief introduction to gravitational fields for beginning high school students. For more information, check out http://www.aplusphysics.com.
- published: 27 Nov 2011
- views: 12432
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Gravitational Fields notes video
published: 08 Nov 2016 -
gravitational field strength
published: 29 Aug 2016 -
Gravitational Field Strength
published: 14 Oct 2016 -
electric and gravitational fields
published: 29 Aug 2016 -
Gravitation-05 Gravitational field
published: 26 Oct 2016 -
05 - Gravitation - Gravitational field
Introductory Physics - Gravitation - Gravitational field www.premedacademy.com
published: 15 Aug 2016 -
Gravitational Field Calculations
published: 11 Jan 2015 -
SPH4U - 4.1 Gravitational Fields
published: 13 Nov 2013 -
Gravitational Field Behavior
published: 10 Feb 2013
Gravitational Fields
- Order: Reorder
- Duration: 15:56
- Updated: 25 Oct 2016
- views: 13
A level Physics lecture on gravitational fields
A level Physics lecture on gravitational fields
wn.com/Gravitational Fields
Gravitational Fields notes video
- Order: Reorder
- Duration: 23:19
- Updated: 08 Nov 2016
- views: 0
- published: 08 Nov 2016
- views: 0
gravitational field strength
- Order: Reorder
- Duration: 3:42
- Updated: 29 Aug 2016
- views: 3
- published: 29 Aug 2016
- views: 3
Gravitational Field Strength
- Order: Reorder
- Duration: 5:38
- Updated: 14 Oct 2016
- views: 0
- published: 14 Oct 2016
- views: 0
electric and gravitational fields
- Order: Reorder
- Duration: 2:42
- Updated: 29 Aug 2016
- views: 0
- published: 29 Aug 2016
- views: 0
Gravitation-05 Gravitational field
- Order: Reorder
- Duration: 2:25
- Updated: 26 Oct 2016
- views: 0
- published: 26 Oct 2016
- views: 0
05 - Gravitation - Gravitational field
- Order: Reorder
- Duration: 2:59
- Updated: 15 Aug 2016
- views: 0
Introductory Physics - Gravitation - Gravitational field
www.premedacademy.com
Introductory Physics - Gravitation - Gravitational field
www.premedacademy.com
wn.com/05 Gravitation Gravitational Field
Introductory Physics - Gravitation - Gravitational field
www.premedacademy.com
- published: 15 Aug 2016
- views: 0
Gravitational Field Calculations
- Order: Reorder
- Duration: 8:08
- Updated: 11 Jan 2015
- views: 100
- published: 11 Jan 2015
- views: 100
SPH4U - 4.1 Gravitational Fields
- Order: Reorder
- Duration: 11:16
- Updated: 13 Nov 2013
- views: 138
- published: 13 Nov 2013
- views: 138
Gravitational Field Behavior
- Order: Reorder
- Duration: 0:59
- Updated: 10 Feb 2013
- views: 1507
- published: 10 Feb 2013
- views: 1507
-
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IB - Fields and forces
An introduction to the electric and gravitational fields.
published: 04 Feb 2014 -
Unit 3 Lesson 11 Gravitational Field Strength
Unit 3 Lesson 11 Gravitational Field Strength: Lecture Only.
published: 02 Dec 2014 -
Unit 3 Lesson 11 Gravitational Field Strength
Unit 3 Lesson 11 Gravitational Field Strength: explanation and problems solving!
published: 08 May 2014 -
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XI_69,Gravitational Field and Potential
Physics, Class XI Chapter : Gravitation Topic: Gravitational field Potential. Classroom lecture by Pradeep Kshetrapal. Language : English mixed with Hindi.
published: 04 Nov 2012 -
2016 Seminar on Physical Mathematics at UNM -- 9
Lecture 9, sections 11.38--11.43: A particle in a gravitational field, The principle of equivalence, Weak, static gravitational fields, Gravitational time dilation, Curvature, Einstein's equations.
published: 24 Mar 2016 -
Michelson-Morley Experiment, Black Holes, Gamma Rays, Gravitational Fields Aleksandr Tsybin 2014
Aleksandr Tsybin - The Michelson-Morley Experiment, Black Holes, Gamma Rays and Gravitational Fields . Talk presented at Natural Philosophy Alliance Conference 2014
published: 31 Oct 2016 -
Gravitational Fields - Lesson 3: Kepler's Third Law and Newton's Law of Universal Gravitation
Skip from 33:15 to 53:08.
published: 20 Jun 2015
Gravitational Field Strength and Orbital Motion
- Order: Reorder
- Duration: 35:20
- Updated: 21 Nov 2014
- views: 242
IB - Fields and forces
- Order: Reorder
- Duration: 31:21
- Updated: 04 Feb 2014
- views: 158
An introduction to the electric and gravitational fields.
An introduction to the electric and gravitational fields.
wn.com/Ib Fields And Forces
An introduction to the electric and gravitational fields.
- published: 04 Feb 2014
- views: 158
Unit 3 Lesson 11 Gravitational Field Strength
- Order: Reorder
- Duration: 33:46
- Updated: 02 Dec 2014
- views: 20
Unit 3 Lesson 11 Gravitational Field Strength
- Order: Reorder
- Duration: 31:09
- Updated: 08 May 2014
- views: 53
Unit 3 Lesson 11 Gravitational Field Strength: explanation and problems solving!
- published: 08 May 2014
- views: 53
Unit 3 Lesson 11 Gravitational Fields
- Order: Reorder
- Duration: 31:45
- Updated: 04 Dec 2013
- views: 30
XI-8-3 Gravitational field, potential and Satellite(2015). Pradeep Kshetrapal Physics
- Order: Reorder
- Duration: 1:03:33
- Updated: 10 Nov 2015
- views: 7179
Physics, Class XI Chapter : GRAVITATION Topic : Field, Potential and Satellite. Classroom lecture by Pradeep Kshetrapal. Language : English mixed with Hind...
Physics, Class XI Chapter : GRAVITATION Topic : Field, Potential and Satellite. Classroom lecture by Pradeep Kshetrapal. Language : English mixed with Hindi.
wn.com/Xi 8 3 Gravitational Field, Potential And Satellite(2015). Pradeep Kshetrapal Physics
XI_69,Gravitational Field and Potential
- Order: Reorder
- Duration: 1:10:18
- Updated: 04 Nov 2012
- views: 34973
Physics, Class XI Chapter : Gravitation Topic: Gravitational field Potential. Classroom lecture by Pradeep Kshetrapal. Language : English mixed with Hindi...
Physics, Class XI Chapter : Gravitation Topic: Gravitational field Potential. Classroom lecture by Pradeep Kshetrapal. Language : English mixed with Hindi.
wn.com/Xi 69,Gravitational Field And Potential
Physics, Class XI Chapter : Gravitation Topic: Gravitational field Potential. Classroom lecture by Pradeep Kshetrapal. Language : English mixed with Hindi.
- published: 04 Nov 2012
- views: 34973
2016 Seminar on Physical Mathematics at UNM -- 9
- Order: Reorder
- Duration: 54:22
- Updated: 24 Mar 2016
- views: 48
Lecture 9, sections 11.38--11.43: A particle in a gravitational field, The principle of equivalence, Weak, static gravitational fields, Gravitational time dila...
Lecture 9, sections 11.38--11.43: A particle in a gravitational field, The principle of equivalence, Weak, static gravitational fields, Gravitational time dilation, Curvature, Einstein's equations.
wn.com/2016 Seminar On Physical Mathematics At Unm 9
Lecture 9, sections 11.38--11.43: A particle in a gravitational field, The principle of equivalence, Weak, static gravitational fields, Gravitational time dilation, Curvature, Einstein's equations.
- published: 24 Mar 2016
- views: 48
Michelson-Morley Experiment, Black Holes, Gamma Rays, Gravitational Fields Aleksandr Tsybin 2014
- Order: Reorder
- Duration: 54:40
- Updated: 31 Oct 2016
- views: 10
Aleksandr Tsybin - The Michelson-Morley Experiment, Black Holes, Gamma Rays and Gravitational Fields . Talk presented at Natural Philosophy Alliance Conference ...
Aleksandr Tsybin - The Michelson-Morley Experiment, Black Holes, Gamma Rays and Gravitational Fields . Talk presented at Natural Philosophy Alliance Conference 2014
wn.com/Michelson Morley Experiment, Black Holes, Gamma Rays, Gravitational Fields Aleksandr Tsybin 2014
Aleksandr Tsybin - The Michelson-Morley Experiment, Black Holes, Gamma Rays and Gravitational Fields . Talk presented at Natural Philosophy Alliance Conference 2014
- published: 31 Oct 2016
- views: 10
Gravitational Fields - Lesson 3: Kepler's Third Law and Newton's Law of Universal Gravitation
- Order: Reorder
- Duration: 1:17:43
- Updated: 20 Jun 2015
- views: 27
Skip from 33:15 to 53:08.
Skip from 33:15 to 53:08.
wn.com/Gravitational Fields Lesson 3 Kepler's Third Law And Newton's Law Of Universal Gravitation
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28:16
Gravitational Fields - A Level Physics
Continuing the A Level revision series covering, fields, the gravitational field, the grav...
published: 19 Mar 2012
Gravitational Fields - A Level Physics
Gravitational Fields - A Level Physics
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5:00
Gravitational Fields | A-Level Physics | Doodle Science
A Level Physics
Doodle Science teaches you high school and College physics in a less bori...
published: 01 Feb 2016
Gravitational Fields | A-Level Physics | Doodle Science
Gravitational Fields | A-Level Physics | Doodle Science
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5:38
Gravitational Field Strength
025 - Gravitational Field Strength
In this video Paul Andersen explains how the gravitati...
published: 22 Jun 2014
Gravitational Field Strength
Gravitational Field Strength
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11:26
A Level Physics: AQA Unit 4: Gravitational Fields
A summary of the key points for gravitational fields: Force, Field Strength, Potential Ene...
published: 04 Jun 2014
A Level Physics: AQA Unit 4: Gravitational Fields
A Level Physics: AQA Unit 4: Gravitational Fields
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7:50
Gravitational Fields
Explains how lower case "g" is both the acceleration due to gravity and also the gravitati...
published: 06 Sep 2009
Gravitational Fields
Gravitational Fields
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2:25
Gravitational Fields
Watch more videos on http://brightstorm.com/science
published: 09 Sep 2010
Gravitational Fields
Gravitational Fields
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1:01
Gravitational Field Animation (Equivalence Principle)
This animation simulates the gravitational field near a planetary body as it is warped by ...
published: 23 Aug 2010
Gravitational Field Animation (Equivalence Principle)
Gravitational Field Animation (Equivalence Principle)
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7:31
Gravitational Field
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published: 14 Aug 2013
Gravitational Field
Gravitational Field
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Gravity Visualized
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Dan Burns explains his s...
published: 10 Mar 2012
Gravity Visualized
Gravity Visualized
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9:35
High School Physics - Gravitational Fields
A brief introduction to gravitational fields for beginning high school students. For more...
published: 27 Nov 2011
High School Physics - Gravitational Fields
High School Physics - Gravitational Fields
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Gravitational Fields
A level Physics lecture on gravitational fields
published: 25 Oct 2016
Gravitational Fields
Gravitational Fields
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Gravitational Fields notes video
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3:42
gravitational field strength
published: 29 Aug 2016
gravitational field strength
gravitational field strength
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Gravitational Field Strength
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Gravitational Field Strength
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electric and gravitational fields
published: 29 Aug 2016
electric and gravitational fields
electric and gravitational fields
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Gravitation-05 Gravitational field
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Gravitation-05 Gravitational field
Gravitation-05 Gravitational field
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05 - Gravitation - Gravitational field
Introductory Physics - Gravitation - Gravitational field
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05 - Gravitation - Gravitational field
05 - Gravitation - Gravitational field
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Gravitational Field Calculations
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Gravitational Field Calculations
Gravitational Field Calculations
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11:16
SPH4U - 4.1 Gravitational Fields
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SPH4U - 4.1 Gravitational Fields
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Gravitational Field Behavior
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Gravitational Field Behavior
Gravitational Field Behavior
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Gravitational Field Strength and Orbital Motion
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published: 21 Nov 2014
Gravitational Field Strength and Orbital Motion
Gravitational Field Strength and Orbital Motion
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31:21
IB - Fields and forces
An introduction to the electric and gravitational fields.
published: 04 Feb 2014
IB - Fields and forces
IB - Fields and forces
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33:46
Unit 3 Lesson 11 Gravitational Field Strength
Unit 3 Lesson 11 Gravitational Field Strength: Lecture Only.
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Unit 3 Lesson 11 Gravitational Field Strength
Unit 3 Lesson 11 Gravitational Field Strength
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31:09
Unit 3 Lesson 11 Gravitational Field Strength
Unit 3 Lesson 11 Gravitational Field Strength: explanation and problems solving!
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Unit 3 Lesson 11 Gravitational Field Strength
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Unit 3 Lesson 11 Gravitational Fields
Dec 4 Lesson on Gravitational Fields
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1:03:33
XI-8-3 Gravitational field, potential and Satellite(2015). Pradeep Kshetrapal Physics
Physics, Class XI Chapter : GRAVITATION Topic : Field, Potential and Satellite. Class...
published: 10 Nov 2015
XI-8-3 Gravitational field, potential and Satellite(2015). Pradeep Kshetrapal Physics
XI-8-3 Gravitational field, potential and Satellite(2015). Pradeep Kshetrapal Physics
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XI_69,Gravitational Field and Potential
Physics, Class XI Chapter : Gravitation Topic: Gravitational field Potential. Classr...
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XI_69,Gravitational Field and Potential
XI_69,Gravitational Field and Potential
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54:22
2016 Seminar on Physical Mathematics at UNM -- 9
Lecture 9, sections 11.38--11.43: A particle in a gravitational field, The principle of e...
published: 24 Mar 2016
2016 Seminar on Physical Mathematics at UNM -- 9
2016 Seminar on Physical Mathematics at UNM -- 9
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54:40
Michelson-Morley Experiment, Black Holes, Gamma Rays, Gravitational Fields Aleksandr Tsybin 2014
Aleksandr Tsybin - The Michelson-Morley Experiment, Black Holes, Gamma Rays and Gravitatio...
published: 31 Oct 2016
Michelson-Morley Experiment, Black Holes, Gamma Rays, Gravitational Fields Aleksandr Tsybin 2014
Michelson-Morley Experiment, Black Holes, Gamma Rays, Gravitational Fields Aleksandr Tsybin 2014
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Gravitational Fields - Lesson 3: Kepler's Third Law and Newton's Law of Universal Gravitation
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Gravitational Fields - Lesson 3: Kepler's Third Law and Newton's Law of Universal Gravitation
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Gravitational Field Strength and Orbital Motion...
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2016 Seminar on Physical Mathematics at UNM -- 9...
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[VIDEO]: Judge At Naturalization Ceremony: If You Don't Like Trump, Go To Another Country
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A federal judge presiding over a naturalization ceremony in San Antonio, Texas last week was caught on video telling the group of new citizens if they don’t like President-elect Donald Trump, they can "go to another country," according to TV station KHOU and reported by Talking Points Memo (TPM) ... He will be your president and if you do not like that, you need to go to another country.” – U.S. Federal Judge John Primomo ....
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Ancient Mummified Crocodile Found To Be Harboring Dozens Of Babies
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The discovery was made by Swedish firm Interspectral, which carried out 3D CT scans on the crocodile. A previous study in the 1990s had revealed the enormous adult was in fact accompanied by a second crocodile, but failed to spot the individually wrapped babies – of which there appear to be at least 47. Curator Lara Weiss believes the reptiles were probably mummified as an offering to the crocodile god Sobek, BBC News reports....
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United States of Detachment
Edit WorldNews.com 22 Nov 2016
Article By WN.com Guest Writer Gilad AtzmonFor years I have been arguing that the Left, Liberals and Progressives are delusional on the verge of total detachment. Hillary Clinton’s astonishing defeat proves that point. Both Clinton and her campaign had been boasting in victorious hubris for months ... “It is a complex computer algorithm that the campaign was prepared to publicly unveil after the election as its invisible guiding hand”....
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[VIDEO]: 7-Eleven Manager Caught On Tape Threatening Employees For Return Of Wages
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Employees at 7-Eleven in Australia have been caught on tape returning a portion of their wages, Raw Story reported. Australia’s ABC News reports a secretly recorded video shows a 7-Eleven employee in Brisbane handing back a portion of her wages in cash back to her manager just after being paid ... “They say agree to paying back the money,” she explains. “If not, you can go find another job ... ....
Bruce Arena Named Head Coach of U.S. Men's National Team (USSF - US Soccer Federation)
Edit Public Technologies 23 Nov 2016
(Source. USSF - US Soccer Federation). I got a call that every soccer player dreams of a few days after our last game of the NWSL season ... Naturally, the veterans gravitate towards the veterans and the newbies gravitate towards the newbies, but there were 11 uncapped players going in so I knew I wasn't going to be by myself ... What I didn't expect was that the veterans would be so welcoming, on and off the field ... USSF - U.S ... (noodl....
Behind The News Specials Series 2016 Ep 6 Our Universe
Edit Australian Broadcasting Corporation 23 Nov 2016
We look at the effects of space on the human body and all about gravitational waves! We find out just why this is one of the biggest discoveries of the century. And BtN gives you a step-by-step guide to becoming an astronaut ... ....
Howard Announces Two Track and Field Signees (Howard University Athletics)
Edit Public Technologies 23 Nov 2016
Howard University announces the signing of Rachel Elder and Aaron Coates to national letters of intent for the track and field program. Rachel Elder is a versatile performer in both track and field events ranging from the 100-meter hurdles to the 400 meters to the high jump, long jump and triple jump....
Giving Tuesday and Beyond: How Millennials Like to Contribute
Edit The Oklahoman 23 Nov 2016
Millennials are known for selfies, Snapchat filters, reality television and — charitable donations? Yes, the generation with a reputation for self-centeredness and instant gratification apparently also exhibits philanthropic tendencies ... Millennial giving for good ... They particularly get behind social causes ... And they don’t necessarily always give to institutions ... “You’re seeing them gravitate towards those ... Holiday giving ... 29 through Dec ... ....
MP asks if Sir Philip Green's assets can be seized over BHS pensions deficit
Edit Belfast Telegraph 23 Nov 2016
The chairman of the Commons Work and Pensions Committee Frank Field has written to The Pensions Regulator (TPR) seeking clarification as to its powers following the store chain's collapse. Share Go To ... The committee published Mr Field's letter on its website as it prepared to take further evidence on BHS at a hearing on Wednesday with TPR chief executive Lesley Titcombe ... Mr Field said ... ....
USU football: running back Devante Mays’ senior season has been injury riddled
Edit Deseret News 23 Nov 2016
Mays limped off the field after carrying the ball eight times for 24 yards ... Utah State’s training staff eventually had to help him off the field while not putting any weight on his right leg ... Myers added they've missed his presence on the field ... "He is a big-bodied running back hitting the holes hard and his ability to score in the open field.” ... As serious as Mays is on the field, he has a lighter side off of it....
Texans coach Bill O'Brien questions officiating after loss to Raiders
Edit Yahoo Daily News 23 Nov 2016
O'Brien chose not to challenge the spot and did not opt for a 32-yard field goal try, but went for it on fourth down with a handoff to Akeem Hunt, who appeared to dive forward for a first down. The ball was again spotted short and, even after O'Brien challenged the spot as replays showed Hunt got the ball past the yard to gain, a replay review did not give Houston the first down. ....
Ahearn paces Binghamton with 27 in win over Ave Maria
Edit The Miami Herald 23 Nov 2016
Ahearn shot an economical 11 of 13 from the field and 4 of 4 at the free throw line ... who shot a crisp 60 percent from the field and 16 of 20 at the line....
Heat’s Josh Richardson not concerned with slow start
Edit The Miami Herald 23 Nov 2016
Josh Richardson hit a buzzer-beater as time was about to expire in the Heat’s loss to the 76ers on Monday. It was no time to celebrate ... He was 0 for 10 from the field — and 0 for 7 on three-point attempts — before he made what was a meaningless basket in the dying seconds of a 101-94 loss ... But his field-goal percentage has plummeted from 45 percent last season to 38 percent this one ... “I didn’t get a preseason....
Warriors’ Draymond Green eyes Defensive Player of the Year Award
Edit San Francisco Chronicle 23 Nov 2016
[...] Green finished second to San Antonio’s Kawhi Leonard in Defensive Player of the Year voting for the second straight season ... During each of his first four seasons in the league, Green improved his scoring, rebounding, assists per game, field-goal and three-point field-goal percentages, blocks per game and minutes per game ... > ....
China upholds open environment for digital economy, Vice Premier
Edit China Daily 23 Nov 2016
Wang reiterated that China is creating a level playing field for all companies which are doing business in China. China's recent efforts, including the adoption of cybersecurity law and the drafting of e-commerce law, are aimed at improving regulation and supervision over digital economy and ensuring a level playing field for all companies, said the vice premier ... ....
McClure’s Career Night Lifts Golden Suns (Arkansas Tech University)
Edit Public Technologies 23 Nov 2016
(Source. Arkansas Tech University) ... Facing a 2-3 zone defense, the Golden Suns began routing their offense through guard Kelsey McClure at the high post ... McClure finished with a career-high 25 points on 8-of-12 shooting from the field and an 8-of-8 night at the free throw line ... She came off the bench to make 9-of-13 field goal tries, including 5-of-8 shots from 3-point range ... Louis for a 1 p.m ... 26....
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