Difference between revisions of "Velocity"
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[[File:lighterstill.jpg]][[File:Velocityimage.jpg|right|frame]] | [[File:lighterstill.jpg]][[File:Velocityimage.jpg|right|frame]] | ||
− | 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 [ | + | 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 [https://en.wikipedia.org/wiki/International_System_of_Units SI (metric) system], it is [[measured]] in meters per second: (m/s) or ms−1. The [https://en.wikipedia.org/wiki/Scalar_(physics) scalar] absolute value ([[magnitude]]) of velocity is [https://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]] | [[File:Velocity.jpg]] | ||
− | The rate of change of velocity is [ | + | The rate of change of velocity is [https://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.[https://en.wikipedia.org/wiki/Velocity] |
==References== | ==References== | ||
− | * Robert Resnick and Jearl Walker, ''[ | + | * Robert Resnick and Jearl Walker, ''[https://www.saburchill.com/physics/chapters/0083.html Fundamentals of Physics]'', Wiley; ISBN 0471232319. |
==External links== | ==External links== | ||
− | *[ | + | *[https://www.physicsclassroom.com/Class/1DKin/U1L1d.html Physicsclassroom.com], Speed and Velocity |
− | *[ | + | *[https://www.scs.cmu.edu/~rapidproto/mechanisms/chpt1.html Introduction to Mechanisms] (Carnegie Mellon University) |
+ | |||
+ | [[Category: Physics]] | ||
+ | [[Category: General Reference]] |
Latest revision as of 02:42, 13 December 2020
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)