LINEAR TRANSMISSION OF MOTION: PULLEYS AND COMPOUND PULLEY SYSTEMS

A pulley is a wheel that rotates around an axis and has a groove. We can divide pulleys into two basic types:

-Fixed pulley: The forces are equal because the rope moves the same distance on both sides. ⟹F=R⟸

-Movable pulley: We need half the force to lift the same weight as with a fixed pulley.

⟹F=R/2⟸



A compound pulley system is a combination of fixed and movable pulleys.We can combine the pulleys in various ways:

-Vertical and horizontal system:

⟹F=R/2xn⟸

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