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Q.

A ball of mass 0.5 kg is dropped down vertically from a height of 3 m above the ground. If it rebounces to a height of 1.92m, then the coefficient of restitution is $\frac{x}{10}$ . The value of $x$ is__

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answer is 8.

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Detailed Solution

$e = \sqrt{\frac{h_{2}}{h_{1}}} = \sqrt{\frac{1.92}{3}} = \sqrt{0.64} = 0.8$

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