what is a compound machine

A compound machine is a machine that consists of two or more simple machines working together to make work easier. Examples of compound machines include wheelbarrows, scissors, and bicycles. Simple machines, such as levers, pulleys, and inclined planes, are combined to create compound machines that can perform more complex tasks. Compound machines have moving parts and are different from simple machines, which are tools that make work easier by changing the direction or amount of force needed to do work.