Search Our pages for specific information about Simple Machines
The ratio of the output force to the input force is the called mechanical advantage . The mechanical advantage of a lever is equal to the ratio of its two arms. For example, the mechanical advantage of an inclined plane (with the force acting parallel to the plane) is the cosecant of the angle of inclination.
Simple machines are often used in combination as components of more complex machines; for example the Archimedes screw, which is a pump, is an example of a complex machine where the screw is a helical inclined plane.