Question

A body rests on a rough horizontal plane. A force is applied to the body directed towards the plane at an angle $\varnothing$ with the vertical. The body can be moved along the plane

• A. Only $\varnothing$ is more than the angle of friction
• B. Only $\varnothing$ is less than the angle of friction
• C. Only $\varnothing$ is equal to the angle of friction
• D. For all values of $\varnothing$

Answer 1

The correct option is A Only $\varnothing$ is more than the angle of friction

Since the coefficient of friction is $\mu$

relation is $F_{\mu }=mgsinQ$

since the angle increases the sin of angle also increases and hence is angle of the force of friction becomes less than the force of reaction hence body moves.