The coefficient of friction between a body and an inclined plane is $\frac{1}{\sqrt{3}}$. If the body is just ready to slide down, the angle of inclination is

Q. A body takes $\frac{4}{3}$ times as much time to slide down rough inclined plane as it takes to slide down an identical but smooth inclined plane. If the angle of inclined plane is ${45}^0$, find the coefficient of friction.

Q. A body is sliding down on a rough inclined plane of inclination ${45}^0$. The time taken by it to slide down on the rough inclined plane is 3 times the time taken by the body to slide down the smooth inclined plane of same inclination. The coefficient of friction between rough inclined plane and the body is

Q. The force required just to move a body up an inclined plane is double the force required just to prevent the body sliding down. If the coefficient of friction is $0.25$, the angle of inclination of the plane is

Q. A body is sliding down an inclined plane forming an angle ${30}^0$ with the horizontal. If the coefficient of friction is 0.3, then acceleration of the body is: