Question

In the figure the block A of mass $m$ is placed on the block B of mass $2m$. B rests on the floor. The co-efficient of friction between all the contact surfaces 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

If both are travelling with same velocity , there is no relative motion or tendency of relative motion. Then there is no friction force between both the surfaces, acceleration $=$ zero.