Block A is kept on block B as shown in figure. It is known that acceleration of block A is 2 m/s2 towards right and acceleration of block B is 3 m/s2 towards right under the effect of unknown forces. Direction of friction force acting on A by B (μAB = 0.3)
(A) is necessarily towards right
(B) may be towards right
(C) may be towards left
(D) may be zero
Correct option: (B, C, D)
Explanation:
B,C,D direction of friction do not dpend on direction of force but it depends on direction of relative motion (velocity)
