Question

A combination of a movable pulley $P_1$​ with a fixed pulley $P_2$​ is used for lifting up a load W. If the free end of the string moves through a distance x, find the distance by which the load W is raised.

• A. x
• B. 2 x
• C. x/2
• D. x²

Answer 1

The correct option is C

x/2

As the thread attached to the pulley $P_1$​ has to move equally on both the sides of the pulley, therefore if the free end of the string moves a distance of x then the load attached to $P_1$​ moves through a distance $\frac{x}{2}$.