what is a pulley?

Pulleys are used to lift heavy loads. They are wheels with a grooved rim.



Belt and pulley system


This system is made up of two pulley wheels joined by a belt that slots into the grooved rim of the wheels.When one of the wheels is rotated,the belt transmits the motion and makes the other wheel rotate.

What is gears?

A gear is a mechanism consisting of two wheels with teeth
Example: A wheel