# The minimum force required to start pushing a body up a rough

Question:

The minimum force required to start pushing a body up a rough (frictional coefficient $\mu$ ) inclined plane is $\mathrm{F}_{1}$ while the minimum force needed to prevent it from sliding down is $\mathrm{F}_{2}$. If the inclined plane makes an angle $\theta$ from the horizontal such that $\tan \theta=2 \mu$ then the ratio $\frac{F_{1}}{F_{2}}$ is :-

1. 4

2. 1

3. 2

4. 3

Correct Option: , 4

Solution: