- published: 24 Mar 2015
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In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body in decelerating from its current speed to a state of rest.
In classical mechanics, the kinetic energy of a non-rotating object of mass m traveling at a speed v is . In relativistic mechanics, this is a good approximation only when v is much less than the speed of light.
The standard unit of kinetic energy is the joule.
The adjective kinetic has its roots in the Greek word κίνησις kinesis, meaning "motion". The dichotomy between kinetic energy and potential energy can be traced back to Aristotle's concepts of actuality and potentiality.
The principle in classical mechanics that E ∝ mv² was first developed by Gottfried Leibniz and Johann Bernoulli, who described kinetic energy as the living force, vis viva. Willem 's Gravesande of the Netherlands provided experimental evidence of this relationship. By dropping weights from different heights into a block of clay, Willem 's Gravesande determined that their penetration depth was proportional to the square of their impact speed. Émilie du Châtelet recognized the implications of the experiment and published an explanation.
You will learn about "Potential and Kinetic Energy" in this video. The law of conservation of energy states that energy cannot be created or destroyed, it can only be converted from one form to another. Potential energy is energy due to position while kinetic energy is energy due to motion. The unit of energy is joules. To understand this better, let us take an example. Look at this pendulum. When we hold it on one side, at that time, it has a certain amount of potential energy. When the pendulum is released, this potential energy starts getting converted to kinetic energy. As the pendulum moves back and forth, the kinetic energy is converted to potential energy and vice versa until the pendulum stops. The formula for potential energy is mgh, where m = mass, g = acceleration due to grav...
079 - Kinetic Energy In this video Paul Andersen explains how the kinetic energy of an object if due to the motion of an object. Objects can have kinetic energy but they cannot have potential energy unless they are part of a system. He then explains how to calculate the transformational and rotational kinetic energy of an object. 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: Olsin, Tage. A Baseball, Cropped from Image:Baseball.jpg, September 24, 2006. Cropped from Image:Baseball.jpg by Tage Olsin. http://commons.wikimedia.org/wiki/F...
Mr. Andersen explains the difference between potential and kinetic gravitational energy. He also uses physics to calculate the energy in various objects. Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
In this video Mr. Swarthout give a general explanation of kinetic energy, the units and the relationship of the kinetic energy of an object to its mass and velocity. You can see a listing of all my videos at my website, http://www.stepbystepscience.com
A simple cartoon film ,consisting simple explanation on the difference between Potential and Kinetic energy.Potential energy is the stored energy in an object due of its position or its configuration whereas Kinetic energy is the energy which a body possesses because of its motion.
What is energy? Can energy be created from nowhere? Obviously not. So from where do extended springs get energy to spring back into place? From where do raised blocks get energy to fall? Two words… potential energy. And how does this change into kinetic energy? Are they the only possibilities? What is conservative force? Learn about all these in this video module. We at Byju's Classes strongly believe that a spirit of learning and understanding can only be inculcated when the student is curious, and that curiosity can be brought about by creative and effective teaching. It is this approach that makes our lectures so successful and gives our students an edge over their counterparts. Our website- http://www.byjus.com/ Download our app on android- https://goo.gl/5Uz70E Download our app on a...
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In my video on the Crookes Radiometer, I showed that the devices spin because of a thermal gas effect -- not the force of photons hitting the vanes. In the comments section, someone asked about kinetic energy and how incoming photons impart force to the rotor. This video is a more complete answer to that question.
KINETIC AND POTENTIAL ENERGY introduces Zog to energy of movement and stored energy. Working with inclined planes, springs and a bouncing ball he learns about both kinds of energy and how each kind of energy can be changed into the other. Also, he learns how chemical potential energy is used to create heat, mechanical power, light and electricity. Written and animated by David Christianson. 10 minutes, color, 2012. Direct link to purchase the DVD: http://phoenixlearninggroup.com/product/elementary-energy-kinetic-and-potential-energy/ http://phoenixlearninggroup.com
Everyday we waste a precious energy - kinetic energy.So,to save kinetic energy is to save oil.The working functions of the machine is like the F1 of KERS system. The structure is compact and easy to operate.It's more compact and efficient.Conversion efficiency around 99%. Dou you whant know more? cgcow1@gmail.com
Learn examples of kinetic energy.
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