Question

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 $\mu$. Both blocks are given the same initial velocity to the right. The acceleration of A with respect to B is:

• A. zero
• B. $\mu$ g to the left
• C. $\mu$ g to the right
• D. $\frac{1}{2}\mu$ g to the left

Answer 1

The correct option is A zero

As the both blocks are given to same initial velocity so there is no friction between A and B block and the whole system may be moved with same velocity.

Thus, the acceleration of A is zero with respect to B.