Question

What are the three uses of a screw?​

Answer 1

- they are used to fasten two pieces of wood or metal.
- screw jack is used for lifting one side of a car or a truck, in order to change the punctured wheel.
- a cork screw is used for pulling out cork from the bottles of wine or ketchup.

Answer 2

fasten things, hold/pull things, amplify force

Step-by-step explanation:

A screw is a type of simple machine.

It can be used to fasten 2 or more things together (ex planks of wood). It can also be used to pull something by screwing into the material and staying there (ex corkscrew for opening wine bottles). It can also be used to magnify force. You can tighten a wingnut by hand and get a significant amount of vertical holding power.