Question

what is simple machine? name their types​

Answer 1

Answer:

any of the basic mechanical devices for applying a force, such as an inclined plane, wedge, or lever.

Answer 2

Answer:

A simple machine is a mechanical device that changes the direction or magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force.

The most notable of these are known as the "six simple machines": the wheel and axle, the lever, the inclined plane, the pulley, the screw, and the wedge, although the latter three are actually just extensions or combinations of the first three.