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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 [http://en.wikipedia.org/wiki/International_System_of_Units SI (metric) system], it is [[measured]] in meters per second: (m/s) or ms−1. The [http://en.wikipedia.org/wiki/Scalar_(physics) scalar] absolute value ([[magnitude]]) of velocity is [http://en.wikipedia.org/wiki/Speed 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:
[[File:Velocity.jpg]]
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.
==External links==
*[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)
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 [http://en.wikipedia.org/wiki/International_System_of_Units SI (metric) system], it is [[measured]] in meters per second: (m/s) or ms−1. The [http://en.wikipedia.org/wiki/Scalar_(physics) scalar] absolute value ([[magnitude]]) of velocity is [http://en.wikipedia.org/wiki/Speed 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:
[[File:Velocity.jpg]]
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.
==External links==
*[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)
