Question

The minimum force required to move a body up an inclined plane is three times the minimum force required to prevent it from sliding down the plane. If co-efficient of friction between the body and inclined plane is 2/√3, the angle of inclined plane is

(A) 60° (B) 45° (C) 30° (D) 15°

Answer 1

I hope it's answer is 60°

Answer 2

Answer:

Explanation: I can only give you a hint .ok.

u mg cos theeta + mg sin theeta = 3(mg sin theeta - u mg cos theeta)