Questions
Two marbles, A and B, lie on a smooth horizontal circular groove at opposite ends of a diameter. A is projected along the grove and at the end of time t impinges on B. The coefficient of restitution is ‘e’. The time interval between first and second collision is
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Correct option is C
Final relative velocity = -e initial relative velocity∴t1=2πrev=2te
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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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