Which type of machine consists of two or more simple machines working together?

A machine that consists of two or more simple machines working together is termed a complex machine. These machines combine the functions of various simple machines, which are the basic mechanical devices like levers, pulleys, wheels, and inclined planes, to perform a more complicated task or to increase efficiency.

In practical terms, a complex machine can be anything from a bicycle, which utilizes wheels and levers, to household appliances like food processors that integrate several functions requiring multiple types of simple machines. The collaboration between different components allows for more advanced operations that a single simple machine could not achieve on its own.

Understanding the distinction between complex and simple machines is fundamental in physics and engineering, as it helps in identifying how devices function and the principles behind their designs.