A ball fall and bounces up and down on a hard floor without losing energy. Which of the following graphs correctly describes the variation of its velocity v with time
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Answer: (a)
Explanation:
direction of velocity is changing instantly when it strikes with the ground without loosing its magnitude.
So, graph (a) is depicting these things.
sign convention:
Apart from that in this graph, download motion is taken as "+ve" while upward motion is taken as "-ve"..
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