Question

What are simple machine how are they useful

Answer 1

Answer:

Simple machine, any of several devices with few or no moving parts that are used to modify motion and force in order to perform work. The simple machines are the inclined plane, lever, wedge, wheel and axle, pulley, and screw.

Answer 2

Answer:

Simple machine, any of several devices with few or no moving parts that are used to modify motion and force in order to perform work. The simple machines are the inclined plane, lever, wedge, wheel and axle, pulley, and screw.

Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities.