what is a complex machine

A complex machine is a combination of two or more simple machines working together to reduce the amount of work needed. Simple machines are devices that use energy to help do work, such as levers, pulleys, and inclined planes. Complex machines, on the other hand, are made up of two or more simple machines working together to make work easier. Examples of complex machines include cars, refrigerators, sewing machines, and bicycles. Complex machines have advantages over simple machines because they often provide a better solution than just a simple machine alone.