Question

A body of mass 10 kg lies on a rough inclined plane of inclination = sin ^-13/5 with the horizontal. When a force of 30 N is applied on the block parallel to & upward the plane, the total reaction by the plane on the block is nearly along:

(A) OA 

(B) OB 

(C) OC 

(D) OD

Answer 1

Correct option (A) OA

Explanation:

Frictional force along the in upward

direction = 10 g sinθ – 30 = 30 Nt

N = log cosθ = 80 Nt

Direction of R is along OA.