Question

A block is kept on a frictionless inclined surface with angle of inclination α. The incline is given an acceleration a to keep the block stationary. Then, α is equal to

(a) g/tan α

(b) g cosec

(c) g

(d) g tan α

Answer 1

Correct option  (d) g tan α

Explanation:

In the frame of wedge, the force diagram of block is shown in figure. From free body diagram of wedge,