one ball fall from a roof & after two hits of to floor it's reach up

one ball fall from a roof & after two hits of to floor it's
reach up to half of the roof height.
than what is the cofficient of restitution.

Question Posted / dhirendra

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BARC, I also Faced
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one ball fall from a roof & after two hits of to floor it's reach up to half of the roof ..

Answer / manish chaurasia

e=.0625

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