What type of machine is a wheel and axle considered?

A wheel and axle is categorized as one of the six simple machines. This classification is based on its basic mechanical function, which involves a circular disc (the wheel) attached to a cylindrical shaft (the axle). When force is applied to the wheel, it rotates around the axle, which facilitates movement and reduces friction. This design allows for easier transportation of loads, making it a fundamental component in various machines and mechanisms.

In contrast to more elaborate structures, simple machines like the wheel and axle do not consist of many interdependent parts, which is a characteristic of complex machines. Therefore, the wheel and axle's efficiency and functionality in transforming and transferring motion is why it is recognized as a simple machine rather than a complex one.