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Saraipinksuper

It is a simple machine. But 2 of the five simple machines. Wheel and Axle, a simple machine consisting of a wheel (or crank) and an axle that turn on the same axis
TheBlueFox

A wheel that turns on a bar or shaft called an axle makes a simple machine that makes it easier to turn things. The bigger the wheel, the less force needed to turn it. Examples are a steering wheel on a car or truck, some kinds of water faucets, and doorknobs.