Question

System is shown in the figure and man is pulling the rope from both sides with constant speed 'u'. Then
the speed of the block will be (M moves vertical

Answer 1

Explanation:

given that a man is pulling the rope from both sides with constant speed u. We know that velocity of pulley is average of velocities of string on both sides. So, the velocity of the block is $\dfrac{3}{4}$ times of speed $u$.