Question

A block of mass 2 kg rests on a rough inclined plane making an angle of with the horizontal. The coefficient of static friction between the block and the plane is 0.7. The frictional force on the block is 

(A) 9.8N 

(B) 0.7 x 9.8 x √3 N 

(C) 9.8 x √3N 

(D) 0.7 x 9.8N

Answer 1

Correct option is (A) 9.8N

Since, mg cos θ > mg sinθ

∴ force of friction is f = mg sinθ

Answer 2

Correct answer is (A) 9.8N