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Q.

A ball is dropped from a height of 40 m. If the coefficient of restitution for the collision between ball and floor is 0.5, after hitting the floor, the ball rebounds to a height of ______m.

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answer is 10.

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Detailed Solution

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e=h2h1⇒h2=e2h1=(0.5)2(40)=404=10m

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