Wheel and Axle
by : Shakrista & Julius
What is a Wheel & Axle ? It is a simple machine consisting of a wheel (or crank) and an axle that turn on the same axis. Steering wheels, doorknobs, and screwdrivers are wheel and axle devices. A crank replaces the wheel in devices such as windlasses, bicycle pedals and hand drills.
How it can be used ? It is mostly used for moving items and for transportation. It vastly reduces the friction between objects by converting it to a rotational motion. Common non vehicular axles are seen in roller conveyors ( with or without converting belts).
Formula = MA rw/ra ; Ma= Mechanical advantage ; Rw = Wheel radius ; Ra= Axle radius