wheel machines

wheel from part of  hundreds of different machines, but they are not machines in themselves. A wheel become a machines when it is mounted on an axle.It become a simple machine called a wheel and axle. It is a machine because it can do work. A windlass is a kind of wheel and axle used to lift loads. For centuries it has been used to raise buckets from water wells. In the windlass (right), a rope car- rying the buckets of the water passes over an axle. The axle is turned by a wheel with a handle. When you turn the handle, yours hand moves in a large  circle, while the axle turns in a small circle. This action turns the small force you apply to the handle into a bigger force at the axle. This bigger force winds up the rope with its heavy load.