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a ball of mass m is dropped onto a floor from a certain height .the collision is perfectly elastic and the ball rebounds to the same height and again falls . find the avg force exerted by the ball on the floor during a long time interval.

a ball of mass m is dropped onto a floor from a certain height .the collision is perfectly elastic and the ball rebounds to the same height and again falls . find the avg force exerted by the ball on the floor during a long time interval.

Grade:12

1 Answers

Mallikarjun Maram
50 Points
9 years ago
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Time between successive bounces is given by

Change in momentum with every bounce is given by

Hence average force exerted by floor during the interval of one bounce is given by

Since the collisions are elastic, average force during long time is same as average force exerted during interval of one bounce.

Hence the answer is mg.

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