Difference between revisions of "Velocity"
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*[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) | ||
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| + | [[Category: Physics]] | ||
| + | [[Category: General Reference]] | ||
Revision as of 16:57, 3 September 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)
