Questions
A ball is dropped from a height h above a floor. If the coefficient of restitution between the floor and the ball is e, the ball after the first rebound will rise to a height of
detailed solution
Correct option is B
Let u and u' be the speeds of the ball before and after striking the floor respectively. Thene=u'/u or u'=euNow u=(2gh) and u'=2gh'Where h' is the height to which the ball rises after rebound.∴uu′=hh′ or h′=u′2u2×h=e2hTalk to our academic expert!
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A steel ball is released from a height of 27 m onto a fixed horizontal steel plate. On bouncing the ball rises to a height of 3 m. Then co-efficient of restitution is
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