What is an example of a complex machine?

A bicycle is an excellent example of a complex machine because it consists of multiple interconnected parts that work together to perform a specific function: transportation. Unlike simple machines, which typically only have one or two moving parts and accomplish basic tasks (for example, a lever, a wheel, or a pulley), a bicycle incorporates various simple machines—such as wheels, levers (in the form of the handlebars and pedals), and gears—into a more intricate system.

The bicycle combines these components to enable functions like steering, accelerating, and braking, illustrating how multiple mechanisms can interact for enhanced efficiency and effectiveness. This complexity allows for a wider range of applications and adjustments, making the bicycle an ideal representation of a complex machine.