What are machines made up of two or more simple machines called?

Machines that consist of two or more simple machines are referred to as compound machines. This terminology is widely accepted in physics and engineering to describe devices that utilize the mechanical advantages of multiple simple machines working together.

Simple machines, such as levers, pulleys, wedges, screws, inclined planes, and wheels and axles, serve the fundamental purpose of making tasks easier by allowing force to be applied more effectively. When these simple machines are combined, they create compound machines that can perform more complex tasks, such as a bicycle (which combines wheels, pedals, and gears) or a car's engine (which combines various mechanical systems).

Understanding compound machines is essential in mechanics because it allows for the analysis of how different mechanical systems interact and amplify force or change direction, making it crucial for designing and understanding various tools and systems used in technology and engineering.