PULLEYS AND COMPOUND PULLEY SYSTEMS

In a system of pulleys the equilibrium between the forces depends on the path that the rope follows.

 PULLEYS:FIXED PULLEY: Has an axle mounted in bearings attached to a supporting structure. A fixed pulley changes the direction of the force on a rope or belt that moves along its circumference. F: R
MOVEABLE PULLEY: Has an axle in a movable block. A single movable pulley is supported by two parts of the same rope and has a mechanical advantage of two. F: R/2

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