Q.

A ball is dropped from a height h. If the coefficient of restitution be e, then to what height will it rise after jumping twice from the ground

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a

eh/2

b

2eh

c

eh

d

e4h

answer is D.

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Detailed Solution

hn=he2n, if n = 2 then hn=he4
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A ball is dropped from a height h. If the coefficient of restitution be e, then to what height will it rise after jumping twice from the ground