Question

In the pulley arrangement shown in Fig. the pulley $P_2$ is movable. Assuming the coefficient of friction between $m$ and surface to be $\mu$, the minimum value of $M$ for which $m$ is at rest is:

• A. $M=\frac{\mu m}{2}$
• B. $m=\frac{\mu M}{2}$
• C. $M=\frac{m}{2\mu }$
• D. $m=\frac{M}{2\mu }$

Answer 1

The correct option is A $M=\frac{\mu m}{2}$