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A ball is dropped on to a floor. If the coefficient of restitution is 0.4, the percentage loss of energy of the ball on rebounding from the floor is

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24%

84%

12%

75%

answer is D.

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Detailed Solution

$\frac{Δ K E}{K E} = (1 - e^{2}) 100$ $= (1 - 0.16) \times 100$ = 84 %

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