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:

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