\( w = \frac{Eit}{96500} \)
\( = \frac{20 \times 3 \times 6432}{96500} \)
\( = 3.99 \approx 4 \)
A wooden block of mass M lies on a rough floor. Another wooden block of the same mass is hanging from the point O through strings as shown in the figure. To achieve equilibrium, the coefficient of static friction between the block on the floor and the floor itself is