https://tcs.nju.edu.cn/wiki/api.php?action=feedcontributions&feedformat=atom&user=192.139.27.28TCS Wiki - User contributions [en]2026-05-01T09:48:49ZUser contributionsMediaWiki 1.45.3https://tcs.nju.edu.cn/wiki/index.php?title=Velocity&diff=7438Velocity2017-02-13T21:31:06Z<p>192.139.27.28: Fixed typo</p>
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<div>'''Velocity''' is a [[measure]] of how [[Speed|fast]] something moves in a particular direction.<ref name=sva>{{Cite web<br />
|url= http://www.physics247.com/physics-homework-help/speed-velocity-acceleration.php<br />
|title=Physics Homework Help: Speed, Velocity, Acceleration<br />
|work=physics247.com<br />
|accessdate=25 March 2010<br />
}}</ref> In other words, a velocity is a [[speed]] with a direction. For instance, if an object moves [[east]] at 7 [[metre]]s per second (7 m/s), we would say that its velocity is 7 m/s to the east. <br />
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To calculate the velocity of an object, we divide its [[Displacement vector|displacement]] (its change of position) by the time it took to change position.<ref name="sva" /><blockquote><math display="block">\text{velocity} = \frac\text{displacement}\text{time}</math></blockquote>For example, if an object moves 20 meters (m) to the left in 4 seconds (s), its velocity (v) would be equal to:<blockquote><math display="block">\text{v} = \frac\text{20 m}\text{4 s} = \text{5 m/s to the left}</math></blockquote><br />
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A change in velocity is acceleration<br />
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==References==<br />
{{reflist}}<br />
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[[Category:measurement]]<br />
[[Category:Physics]]<br />
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[[fr:Vitesse]]</div>192.139.27.28