Question

The minimum force required to start pushing a body up a rough (frictional coefficient $\mu$) inclined plane is $F_1$ while the minimum force needed to prevent it from sliding down is $F_2$. If the inclined plane makes an angle $\theta$ from the horizontal such that $\tan \theta =2\mu$ then the ratio $F_1/F_2$ is then:

• A. $3$
• B. $4$
• C. $1$
• D. $2$

Answer 1

The correct option is A $3$