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A ball of mass 0.2 kg is dropped down vertically from a height of 1m above the ground. If it rebounds to a height of 0.64 m, find the coefficient of restitution between the surface of the ball and ground.

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0.32

0.64

0.16

0.8

answer is D.

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Detailed Solution

h_{n} = e^{2n} h_{0}

$h_{0} = 1 m, h_{n} = 0.69 m$

$h_{1} = 0.64 m$

$0 .64 = e^{2} \times 1 m$

$e = 0 .8$

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