Answer:
A pulley
They are simple, yet powerful devices that can make small forces move large objects. It is designed to support movement and redirect tension.
The Screw
The screw help to hold things together,
such as pieces of wood or metal. screws
provide more strength and holding
power. They also form a tight seal.
They can also be removed fairly easily. Examples of screws included the grooves on a jar or soda bottle lids, the end of light
bulbs, water faucets and hoses, bottle caps, gas tank ,work screw and ect.
The Lever
Like other machines, a lever makes work easier by changing the force applied to the machine the distance over which the force is applied.
