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A block A is placed over a long rough pl...

A block A is placed over a long rough plank B of same mass as shown in figure. The plank is placed over a smooth horizontal surface At time t=0, block A is given a velocity `v_(0)` in horizontal direction Let `v_(1)` and `v_(2)` be the velocities of A and B at time L. Then choose the correct graph between `v_(1)` or `v_(2)` and t

A

B

C

D

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The correct Answer is:
B
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