Movable pully
When two or more pulleys are used together it is called a compound pulley system.
Block and Tackle
blck and tackle
It is called a compound machine.
assuming that your question is what jobs are pulleys used for... then the answer is any job that you need to lift something that is heavy. The pulley give a mechanical advantage when used together with other pulleys to apply more force to move the object
They used ropes and other materials in Egypt to put it together.
several pulleys working together is known as a pulley system.
pulleys
Two kinds of pulleys are the fixed pulley and the movable pulley
Simple pulley. Compound pulley. The reel is composed of two or more pulleys.
There are two types of pulleys 1. movable pulley 2. fixed pulley
Movable and fixed.