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Q.

In the figure the block A of mass m is place on the block B of mass 2m. B rests on the floor. The co-efficient of friction between A and B as well as that between the floor and B is μ. Both blocks are given the same initial velocity to the right. The acceleration of A with respect to B is 

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a

Zero

b

1/2  μg to the left

c

μg to the left

d

μg to the right

answer is A.

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Detailed Solution

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There is no relative motion between A and B and hence no relative acceleration

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