Wheel & Axle
A wheel and axle work together to move a load from one place to another. The wheel rotates around the axle, and the load is attached to the axle. The wheel's outer edge allows the input force to be spread out across a longer distance. The wheel experiences rolling frictionresistance as objects or surfaces rub against each other, which is less than most other forms of friction.*Macaulay, 1988
The wheel and axle actually operate as a third-class lever. The axle is the fulcrum and load point while the wheel works as the effort arm.*Macaulay, 1988
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