InterviewSolution
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InterviewSolution
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Body `A `of mass `m` and `B` of mass `3m` move towards each other with velocities `V and 2 V` respectivally from the positions as shown , along a smooth horizontal circule track of redius `r`. After the first elastic collision , they will collide again after the time: A. `(2 pi r)/(V)`B. `(pi r)/(2V)`C. `(pi r)/(V)`D. `(2 pi r)/(3V)` |
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Answer» Correct Answer - B `e = 1 = (Velocity of separation)/(2 V - (- V))` Velocity of separation `= 3 V` Required `= (2 pi r)/(3 V)` |
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