What Is a Pulley Formula?


Quick Answer

The formula for the mechanical advantage of a pulley is P = nW, where n is the number of ropes in the system, P is the force applied to the rope and W is the load. This applies when the force is in the same direction as the desired movement.

Continue Reading
Related Videos

Full Answer

If the direction of force is opposite the movement, subtract 1 from the number of ropes. Fixed pulleys offer no mechanical advantage; they simply redirect applied force. Movable pulleys distribute load tension between multiple cables. For example, a 50-kg load lifted with two cables would require a 25-kg force equivalent on each end.

Learn more about Physics

Related Questions