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Explain with an example where "speed rem...

Explain with an example where "speed remains constant, but its velocity changes".

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1) Whirl continuously a stone which is tied to the end of the string.
2) Draw its path of motion and velocity vectors at different positions as showm in figure.
3) Assume that the speed of stone is constant.
4) We observe that the path of the stone is a circle, and the direction of velocity changes at every instant of time, but the speed is constant.
5) In this activity, we observe that though speed remains constant, its velocity changes.
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