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A ball of mass m is dropped onto a floor...

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 averge force exerted by the ball on the floor during a long time interval.

A

`mg`

B

`2mg`

C

`3mg`

D

proportional to m and h

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The correct Answer is:
A
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