Application:
The pulley allows for the movement of loads up, down, or at an angle. It is particularly useful for moving objects to hard-to-reach locations. It makes lifting heavy objects easier and minimizes the use of ladders or large industrial machines for material transport on construction sites.

Structure:
A pulley is a simple device consisting of a wheel and a rope. The rope fits snugly into the grooves of the wheel. One part of the rope is attached to the load. When one side of the pulley is pulled, the wheel rotates, and the load moves.

The load capacity of the pulley depends on the number of pulleys in the system. Increasing the number of pulleys reduces the load's gravitational force.