Question

A body of mass 2 kg is lying on a rough inclined plane of inclination 30º. Find the magnitude of the force parallel to the incline needed to make the block move (a) up the incline (b) down the incline. Coefficient of static friction = 0.2 

(A) 13 N, 5 N 

(B) 13 N, 13 N 

(C) 13 N, 0 N 

(D) 5 N, 13 N

Answer 1

Correct option (C) 13 N, 0 N   

Explanation:

For upward f = mg sinθ  + μmg cosθ