The wheel and axle is a form of simple machine used to make tasks simpler in regards to manipulating force by applying the ide of mechanically advantage. The wheel and axle consists of a ring disk, recognized as a wheel, v a rod through the center of it, well-known as the axle. This mechanism uses angular momentum and also torque to do occupational on objects, typically versus the force of gravity. The wheel and also axle simple an equipment is very closely related to gears.

Like all other an easy machines the wheel and axle system transforms the pressure by transforming the street over i m sorry the pressure must be applied; if the input force is diminished to $frac15$ the output force, then the force must be used over five times the distance. The occupational done is always force time distance, and this must constantly be the same because of the preservation of energy.

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The wheel and axle both revolve at the exact same rate. What this method is that both the axle and the wheel will complete one full rotation in the very same amount that time (as opposed to just how gears work). Due to the size difference in the radius that the wheel and axle, this means that the street the two parts rotate v in the exact same amount of time is different. This is because of the difference in the circumferences the the wheel itself and the axle the supports it. This offers the conditions for mechanically advantage. The mechanical benefit for this device is ideally:<2>

$IMA=fracRr$

where $R$ is the radius the the wheel, and $r$ is the radius of the axle, displayed in figure 2.

A wheel and axle mechanism need a force in order to lift the load, however that force can be much less than the load of the object. Return the pressure a human needs to apply may no be very big compared come the force it does on the object, the distance they have to rotate the wheel is much bigger than the distance the axle rotates through.

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Ideally there space no losses throughout the power transfer, however in fact there is no such thing as a device with 100% efficiency. Power will it is in lost because of non-conservative pressures such as friction, yet wheel and also axle systems frequently have very high efficiencies.