What a sheave wheel is and what it does?

A sheave wheel, commonly known as a pulley, is a wheel with a grooved rim designed to guide a rope, cable, or belt. It is used to change the direction of force applied to the rope and can also provide a mechanical advantage, making it easier to lift heavy loads. Sheave wheels are often employed in various applications, such as cranes, elevators, and lifting systems, to facilitate the movement of materials and reduce the effort needed for lifting.