- published: 08 Apr 2013
- views: 66868
In physics, action is an attribute of the dynamics of a physical system. It is a mathematical functional which takes the trajectory, also called path or history, of the system as its argument and has a real number as its result. Generally, the action takes different values for different paths. Action has the dimensions of [energy]·[time] or [momentum]·[length], and its SI unit is joule-second. This is the same unit as that of angular momentum.
Empirical laws are frequently expressed as differential equations, which describe how physical quantities such as position and momentum change continuously with time. Given the initial and boundary conditions for the situation, the "solution" to these empirical equations is an implicit function describing the behavior of the system.
There is an alternative approach to finding equations of motion. Classical mechanics postulates that the path actually followed by a physical system is that for which the action is minimized, or, more generally, is stationary. In other words, the action satisfies a variational principle: the principle of stationary action (see also below). The action is defined by an integral, and the classical equations of motion of a system can be derived by minimizing the value of that integral.
Action may refer to:
A differential equation is a mathematical equation that relates some function with its derivatives. In applications, the functions usually represent physical quantities, the derivatives represent their rates of change, and the equation defines a relationship between the two. Because such relations are extremely common, differential equations play a prominent role in many disciplines including engineering, physics, economics, and biology.
In pure mathematics, differential equations are studied from several different perspectives, mostly concerned with their solutions—the set of functions that satisfy the equation. Only the simplest differential equations are solvable by explicit formulas; however, some properties of solutions of a given differential equation may be determined without finding their exact form.
If a self-contained formula for the solution is not available, the solution may be numerically approximated using computers. The theory of dynamical systems puts emphasis on qualitative analysis of systems described by differential equations, while many numerical methods have been developed to determine solutions with a given degree of accuracy.
Action painting, sometimes called "gestural abstraction", is a style of painting in which paint is spontaneously dribbled, splashed or smeared onto the canvas, rather than being carefully applied. The resulting work often emphasizes the physical act of painting itself as an essential aspect of the finished work or concern of its artist.
The style was widespread from the 1940s until the early 1960s, and is closely associated with abstract expressionism (some critics have used the terms "action painting" and "abstract expressionism" interchangeably). A comparison is often drawn between the American action painting and the French tachisme.
The term was coined by the American critic Harold Rosenberg in 1952, in his essay "The American Action Painters", and signaled a major shift in the aesthetic perspective of New York School painters and critics. According to Rosenberg the canvas was "an arena in which to act". While abstract expressionists such as Jackson Pollock, Franz Kline and Willem de Kooning had long been outspoken in their view of a painting as an arena within which to come to terms with the act of creation, earlier critics sympathetic to their cause, like Clement Greenberg, focused on their works' "objectness." To Greenberg, it was the physicality of the paintings' clotted and oil-caked surfaces that was the key to understanding them. "Some of the labels that became attached to Abstract Expressionism, like "informel" and "Action Painting," definitely implied this; one was given to understand that what was involved was an utterly new kind of art that was no longer art in any accepted sense. This was, of course, absurd." – Clement Greenberg, "Post Painterly Abstraction".
Here's a qualitative introduction to another way of looking at physics.
This video is part of an online course, Differential Equations in Action. Check out the course here: https://www.udacity.com/course/cs222.
Droplets levitating on sound waves, water orbiting in microgravity, and more. In this video, produced in a collaboration with Hashem AL-ghaili, we delve into the amazing world of fluids and physics.
Newton's Cradle experiments in Kerbal Space Program with explosions and awesome motion in motion. Hit that LIKE button and SHARE it on out to your friends. SUBSCRIBE for more and catch the annotations for links to additional videos. Join me on Facebook! https://www.facebook.com/JatwaaGamerX
Sometimes the action in movies works and sometimes... well... not so much. In this video we'll be looking at the physics of action movies with scenes from Speed, The Lost World: Jurassic Park, The Amazing Spider-Man, Fast Five and many more. Enjoy!
An object moving freely from one point to another will take a path of least action. Imagine throwing a ball, it would go up and come down in an arc, and it would do this every time. So how does every ball know to take this same path? Why don’t balls take a crazy wibbly wobbly imagined path?
smoke precipitator
Does quantum entanglement make faster-than-light communication possible? What is NOT random? http://bit.ly/NOTrandoVe First, I know this video is not easy to understand. Thank you for taking the time to attempt to understand it. I've been working on this for over six months over which time my understanding has improved. Quantum entanglement and spooky action at a distance are still debated by professors of quantum physics (I know because I discussed this topic with two of them). Does hidden information (called hidden variables by physicists) exist? If it does, the experiment violating Bell inequalities indicates that hidden variables must update faster than light - they would be considered 'non-local'. On the other hand if you don't consider the spins before you make the measurement then ...
GCSE Science Doodle Science teaches you high school 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 moment is the turning effect of a force. It’s calculated by multiplying the force by the perpendicular distance between the force and the pivot. For example, by turning a spanner you are producing a moment. If you apply a force of 15N to the end of the spanner and the length of it is 0.1m, then the moment you are applying is 1.5Nm. However you can apply a force that is not perpendicular, in which case the distance is not the length of the spanner but is the distance from the line of action of the force to the pivot. This will produce a smaller moment, so to produce the maximum...
Client: Self-Initiated Role: Art Direction, Design, Animation, Modelling, Sound Design Format: Short Film 1920x1080 Weather Tests is an exploratory film project which is an attempt of exaggereting actions and physics of each season.
For my physical action, I chose Michael Jackson's Moonwalk. Which is amazing to watch anywhere. The movements, and the motion, are a perfect mixture of mechanical and organic. Adding in extra dance moves to finish it off, was a challenge. How would it flow into the next? How would it set at the end. After a few careful calculations I pieced this together for reference to begin blocking out animation.
Compilation of my works at Weta Digital and Blur studio ( 2005- recent ) I was responsible for all the animation ( except the black and white ones. Projects: - The Hobbit : An Unexpected Journey - The Adventure of Tintin - The Goon Trailer - Goldfish Cracker Commercial - Jabbawacky animation test CopyRight of Weta Digital, Blur Studio, Warner brothers Notes : This compilation is focusing more on performance. I have another reel that focus more on action and physical animation .
Zink produced and designed a series of promos for the 2013 Rebrand of the Space Channel in Toronto. To effectively promote the shows the Interstitials needed to be very realistic and in most cases feel like a seamless integration. Featured here is an example from the 2013 show 'Orphan Black' which is a combination of live action, physical models and CGI.
A long piece of rope represents three dimensionally a series of waves floating in space, as well as producing sounds from the physical action of their movement: the rope which creates the volume also simultaneously creates the sound by cutting through the air, making up a single element. Depending on how we may act in front of it, according to the number of observers and their movements, it will pass from a steady line without sound to chaotic shapes of irregular sounds (the more movement there is around the installation) through the different phases of sinusoidal waves and harmonic sounds. But even though this could seem like a mere representation of what we can’t see for ourselves, beyond the persistence of vision, it connects with our most visceral side, combining the intangible beaut...
Vital Films presents "INSIGHT" with Aidan Sheahan. In association with Altitude Filmworks and Aspen/Snowmass. "Insight" shows a unique look into skiing and the power forged within the athletes mind. As action sports athletes must push themselves physically, they also must equally push themselves mentally. “Action sports are a mental game. Every trick, variation and landing is generated in your mind as a vision or dream of what you want to do next.” "Insight" was shot in Aspen/Snomwass terrain parks, using remote controlled drones and a Cineflex Camera. Vital Films is also proud to produce & edit all films using renewable solar energy. Music by The Grouch "Lighthouses" from "The Tortoise And The Crow Project" - www.therealgrouch.com Want to see more? Watch Torin Yater-Wallace & Ai...
What are the physical contours of a body, and where is the borderline between a body and space? What designates the ultimate tension? A body creates lines of force in space. Initially measured with white tape this line is 100 meters long. Available space is filled by this tape: it outlines the path, the action space and displays the physical limits.
In the third installment of our series, Tony 'Jedi' Doyle of UK Bike Skills talks about drops and why the simple physical action needed to perform a drop-off can be applied to any size of drop - it's all in the head... www.ukbikeskills.co.uk www.singletrackworld.com
"Unrelenting Physical Aggression" is composed of punches, kicks, throws and grunts sampled from some of the most popular action film sequences (according to the Internet). The clip was created using custom rotoscoping software that transforms visual artifacts from aggressive cinematic gestures into vector shapes that look like paint as it splatters on a canvas. The software was made with openFrameworks. "Unrelenting Physical Aggression" is part of a series called Action Painting, which presents cinemas most vicious and violent moments as our culture has come to appreciate them -- as beautiful works of art. More info on Action Painting is available here: http://www.mantissa.ca/projects/actionpainting.php http://www.flickr.com/photos/mantissa/sets/72157608334975903/ To read about how thi...
This is a selection of some the CG animation I've done over the years. I broke my reel down into two main categories. This one being "creature animation" which is a subset of character animation more on the physical action side of the ledger with less of the thought and emotion involved. I've stolen this definition of character animation from Wikipedia 'cause I like the sound of it: "Character animation is artistically unique from other animation in that it involves the creation of apparent thought and emotion in addition to physical action." I've included the "acting" side of my work that fits the above definition better under the description of "character animation" Why the breakdown you ask? That seems to be the way people looking for character animation types like to separate thing...
Here's a qualitative introduction to another way of looking at physics.
This video is part of an online course, Differential Equations in Action. Check out the course here: https://www.udacity.com/course/cs222.
Droplets levitating on sound waves, water orbiting in microgravity, and more. In this video, produced in a collaboration with Hashem AL-ghaili, we delve into the amazing world of fluids and physics.
Newton's Cradle experiments in Kerbal Space Program with explosions and awesome motion in motion. Hit that LIKE button and SHARE it on out to your friends. SUBSCRIBE for more and catch the annotations for links to additional videos. Join me on Facebook! https://www.facebook.com/JatwaaGamerX
Sometimes the action in movies works and sometimes... well... not so much. In this video we'll be looking at the physics of action movies with scenes from Speed, The Lost World: Jurassic Park, The Amazing Spider-Man, Fast Five and many more. Enjoy!
An object moving freely from one point to another will take a path of least action. Imagine throwing a ball, it would go up and come down in an arc, and it would do this every time. So how does every ball know to take this same path? Why don’t balls take a crazy wibbly wobbly imagined path?
smoke precipitator
Does quantum entanglement make faster-than-light communication possible? What is NOT random? http://bit.ly/NOTrandoVe First, I know this video is not easy to understand. Thank you for taking the time to attempt to understand it. I've been working on this for over six months over which time my understanding has improved. Quantum entanglement and spooky action at a distance are still debated by professors of quantum physics (I know because I discussed this topic with two of them). Does hidden information (called hidden variables by physicists) exist? If it does, the experiment violating Bell inequalities indicates that hidden variables must update faster than light - they would be considered 'non-local'. On the other hand if you don't consider the spins before you make the measurement then ...
GCSE Science Doodle Science teaches you high school 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 moment is the turning effect of a force. It’s calculated by multiplying the force by the perpendicular distance between the force and the pivot. For example, by turning a spanner you are producing a moment. If you apply a force of 15N to the end of the spanner and the length of it is 0.1m, then the moment you are applying is 1.5Nm. However you can apply a force that is not perpendicular, in which case the distance is not the length of the spanner but is the distance from the line of action of the force to the pivot. This will produce a smaller moment, so to produce the maximum...
Client: Self-Initiated Role: Art Direction, Design, Animation, Modelling, Sound Design Format: Short Film 1920x1080 Weather Tests is an exploratory film project which is an attempt of exaggereting actions and physics of each season.
For my physical action, I chose Michael Jackson's Moonwalk. Which is amazing to watch anywhere. The movements, and the motion, are a perfect mixture of mechanical and organic. Adding in extra dance moves to finish it off, was a challenge. How would it flow into the next? How would it set at the end. After a few careful calculations I pieced this together for reference to begin blocking out animation.
Compilation of my works at Weta Digital and Blur studio ( 2005- recent ) I was responsible for all the animation ( except the black and white ones. Projects: - The Hobbit : An Unexpected Journey - The Adventure of Tintin - The Goon Trailer - Goldfish Cracker Commercial - Jabbawacky animation test CopyRight of Weta Digital, Blur Studio, Warner brothers Notes : This compilation is focusing more on performance. I have another reel that focus more on action and physical animation .
Zink produced and designed a series of promos for the 2013 Rebrand of the Space Channel in Toronto. To effectively promote the shows the Interstitials needed to be very realistic and in most cases feel like a seamless integration. Featured here is an example from the 2013 show 'Orphan Black' which is a combination of live action, physical models and CGI.
A long piece of rope represents three dimensionally a series of waves floating in space, as well as producing sounds from the physical action of their movement: the rope which creates the volume also simultaneously creates the sound by cutting through the air, making up a single element. Depending on how we may act in front of it, according to the number of observers and their movements, it will pass from a steady line without sound to chaotic shapes of irregular sounds (the more movement there is around the installation) through the different phases of sinusoidal waves and harmonic sounds. But even though this could seem like a mere representation of what we can’t see for ourselves, beyond the persistence of vision, it connects with our most visceral side, combining the intangible beaut...
Vital Films presents "INSIGHT" with Aidan Sheahan. In association with Altitude Filmworks and Aspen/Snowmass. "Insight" shows a unique look into skiing and the power forged within the athletes mind. As action sports athletes must push themselves physically, they also must equally push themselves mentally. “Action sports are a mental game. Every trick, variation and landing is generated in your mind as a vision or dream of what you want to do next.” "Insight" was shot in Aspen/Snomwass terrain parks, using remote controlled drones and a Cineflex Camera. Vital Films is also proud to produce & edit all films using renewable solar energy. Music by The Grouch "Lighthouses" from "The Tortoise And The Crow Project" - www.therealgrouch.com Want to see more? Watch Torin Yater-Wallace & Ai...
What are the physical contours of a body, and where is the borderline between a body and space? What designates the ultimate tension? A body creates lines of force in space. Initially measured with white tape this line is 100 meters long. Available space is filled by this tape: it outlines the path, the action space and displays the physical limits.
In the third installment of our series, Tony 'Jedi' Doyle of UK Bike Skills talks about drops and why the simple physical action needed to perform a drop-off can be applied to any size of drop - it's all in the head... www.ukbikeskills.co.uk www.singletrackworld.com
"Unrelenting Physical Aggression" is composed of punches, kicks, throws and grunts sampled from some of the most popular action film sequences (according to the Internet). The clip was created using custom rotoscoping software that transforms visual artifacts from aggressive cinematic gestures into vector shapes that look like paint as it splatters on a canvas. The software was made with openFrameworks. "Unrelenting Physical Aggression" is part of a series called Action Painting, which presents cinemas most vicious and violent moments as our culture has come to appreciate them -- as beautiful works of art. More info on Action Painting is available here: http://www.mantissa.ca/projects/actionpainting.php http://www.flickr.com/photos/mantissa/sets/72157608334975903/ To read about how thi...
This is a selection of some the CG animation I've done over the years. I broke my reel down into two main categories. This one being "creature animation" which is a subset of character animation more on the physical action side of the ledger with less of the thought and emotion involved. I've stolen this definition of character animation from Wikipedia 'cause I like the sound of it: "Character animation is artistically unique from other animation in that it involves the creation of apparent thought and emotion in addition to physical action." I've included the "acting" side of my work that fits the above definition better under the description of "character animation" Why the breakdown you ask? That seems to be the way people looking for character animation types like to separate thing...
Action Physics Lecture 22 July. This video contains all the demonstrations but not the lecture slides.
Creflo Dollar preaching on resisting the enemy with physical actions.
Hardwell - I AM HARDWELL United We Are 2015 Live at Ziggo Dome (First 2 HOURS) For more UWA tourdates + info → http://hwl.dj/UWATOUR Download #UnitedWeAre on iTunes → http://hwl.dj/UWAITUNES Tracklist → http://hwl.dj/UWATRACKLIST Hardwell presents Revealed Vol. 6 → http://hwl.dj/REVRVol6 Hardwell - United We Are (Album) → http://bit.ly/UNITEDWEARE After releasing his chart-dominating debut artist album ‘United We Are’, with a double dose of sold-out shows at Amsterdam’s colossal Ziggo Dome, Hardwell welcomed fans across the planet to tune in and be a part of the action, as he continued to solidify his dominance as one of the most active artists on social media in dance music today. With consistent organic fan growth through engagement across his social media channels, that allows him t...
//Action film is a film genre in which the protagonist or protagonists end up in a series of challenges that typically include violence, close combat, physical feats, and frantic chases. Action films tend to feature a resourceful hero struggling against incredible odds, which include life-threatening situations, a villain, and or a pursuit which generally concludes in victory for the hero//
Action film is a film genre in which the protagonist or protagonists end up in a series of challenges that typically include violence, close combat, physical feats, and frantic chases. Action films tend to feature a resourceful hero struggling against incredible odds, which include life-threatening situations, a villain, or a pursuit which generally concludes in victory for the hero. Advancements in CGI have made it cheaper and easier to create action sequences and other visual effects that required the efforts of professional stunt crews in the past. However, reactions to action films containing significant amounts of CGI have been mixed as films that use computer animations to create unrealistic, highly unbelievable events are often met with criticism.[1] While action has long been a re...
Action film is a film genre in which the protagonist or protagonists end up in a series of challenges that typically include violence, close combat, physical feats, and frantic chases. Action films tend to feature a resourceful hero struggling against incredible odds, which include life-threatening situations, a villain, and/or a pursuit which generally concludes in victory for the hero
Uncharted 4 Gameplay Part 1 - Uncharted 4 Walkthrough Part 1 - Uncharted 4 Review, Multiplayer, Chapter 1, Trailer, Playthrough and more!! I've got the FULL GAME of Uncharted 4 A Thief's End, and I'm bringing a full series and a giveaway your way!! This series will include all of the Chapters, the Ending, the Prologue and Epilogue, Multiplayer, the Cutscenes, a Review, Easter Eggs, and much more!! Let me know what you think :) WANT FREE GIFT CARDS?? http://fma.cash/ghostrobo FOLLOW ME ON TWITTER: http://twitter.com/GhostRobo FOLLOW ME ON INSTAGRAM: http://instagram.com/therealGhostRobo #GhostRoboArmy for life!! This review copy of Uncharted 4 was provided by PlayStation. Three years after the events of Uncharted 3: Drake's Deception, Nathan "Nate" Drake, now retired as a fortune hunte...
Action film is a film genre in which the protagonist or protagonists end up in a series of challenges that typically include violence, close combat, physical feats, and frantic chases. Action films tend to feature a resourceful hero struggling against incredible odds, which include life-threatening situations, a villain, and/or a pursuit which generally concludes in victory for the hero 2312412412