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Two balls P and Q are at opposite ends of the diameter of a frictionless horizontal circular groove. P is projected along the groove and at the end of T second, it strikes ball Q. Let difference in their final velocities b proportional to the initial velocity of ball P and coefficient of proportionality is e then second strike occurs at :- (1) 2T/e (2) e/2T (3) 2eT (4) T/2e


 

 
Two balls P and Q are at opposite ends of the diameter of a frictionless horizontal circular groove. P is projected along the groove and at the end of T second, it strikes ball Q. Let difference in their final velocities b proportional to the initial velocity of ball P and coefficient of proportionality is e then second strike occurs at :-
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(1) 2T/e (2) e/2T (3) 2eT (4) T/2e


Grade:10

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