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A ball of mass 1kg is dropped from height of 10m on a surface of coefficient of restitution 0.4. The maximum value of potential energy of the ball after first rebounce will be $[T a k e g = 10 m / s^{2}]$

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8 J

16 J

25 J

50 J

answer is B.

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Detailed Solution

$h_{2} = e^{2} h = {(0.4)}^{2} \times 10 m = 1.6 m$

$U^{1} = m g h = 1 \times 10 \times 1.6 J = 16 J$

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