Difference between revisions of "Velocity"
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The rate of change of velocity is [http://en.wikipedia.org/wiki/Acceleration acceleration] – how an object's speed or direction [[changes]] over time, and how it is changing at a particular point in time.[http://en.wikipedia.org/wiki/Velocity] | The rate of change of velocity is [http://en.wikipedia.org/wiki/Acceleration acceleration] – how an object's speed or direction [[changes]] over time, and how it is changing at a particular point in time.[http://en.wikipedia.org/wiki/Velocity] | ||
− | + | ==References== | |
* Robert Resnick and Jearl Walker, ''[http://www.saburchill.com/physics/chapters/0083.html Fundamentals of Physics]'', Wiley; ISBN 0471232319. | * Robert Resnick and Jearl Walker, ''[http://www.saburchill.com/physics/chapters/0083.html Fundamentals of Physics]'', Wiley; ISBN 0471232319. | ||
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==External links== | ==External links== | ||
*[http://www.physicsclassroom.com/Class/1DKin/U1L1d.html Physicsclassroom.com], Speed and Velocity | *[http://www.physicsclassroom.com/Class/1DKin/U1L1d.html Physicsclassroom.com], Speed and Velocity | ||
*[http://www.scs.cmu.edu/~rapidproto/mechanisms/chpt1.html Introduction to Mechanisms] (Carnegie Mellon University) | *[http://www.scs.cmu.edu/~rapidproto/mechanisms/chpt1.html Introduction to Mechanisms] (Carnegie Mellon University) |
Revision as of 00:54, 4 March 2010
In physics, velocity is the rate of change of position. It is a vector physical quantity; both speed and direction are required to define it. In the SI (metric) system, it is measured in meters per second: (m/s) or ms−1. The scalar absolute value (magnitude) of velocity is speed. For example, "5 meters per second" is a scalar and not a vector, whereas "5 meters per second east" is a vector. The average velocity v of an object moving through a displacement (Δx) during a time interval (Δt) is described by the formula:
The rate of change of velocity is acceleration – how an object's speed or direction changes over time, and how it is changing at a particular point in time.[1]
References
- Robert Resnick and Jearl Walker, Fundamentals of Physics, Wiley; ISBN 0471232319.
External links
- Physicsclassroom.com, Speed and Velocity
- Introduction to Mechanisms (Carnegie Mellon University)