top of page
Andrew
savage
Pulley
A pulley is really a kind of wheel.Pulleys are so important that people give them their own category. A pulley is a wheel with two raised edges so that a rope or a string will run along the wheel without coming off. It's often also called a block and tackle.
There are three diffrent kinds of pulleys fixed, movable, and combined.
Fixed pulley
A fixed pulley doesn't give you any mechanical advantage, but it changes the direction of the force. An example is a crane
Movable pulley
A movable pulley does have a mechanical advantage: you can use less effort to get things done.
Combined pulley
A combined pulley makes life easier as the effort needed to lift the load is less than half the weight of the load. an example is an elevator
bottom of page