A lever is a simple machine consisting of a rigid bar that pivots about one point and that is used to move a load at a second point by a force applied at a third point. The pivot point on which the lever turns or is supported is known as the fulcrum.
A class 3 lever does not have the mechanical advantage of class-one levers and class-two levers, so examples are less common. The effort and the load are both on the same side of the fulcrum, but the effort is closer to the fulcrum than the load, so more force is put in the effort than is applied to the load.
The lever operates by applying forces at different distances from the fulcrum, or pivot. ... If the distance from the fulcrum to the input force is less than from the fulcrum to the output force, then the lever reduces the input force.