Lever
A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load and effort, the lever is divided... Wikipedia
Most common type: third-class lever
Classification: Simple machine
Components: fulcrum or pivot, load and effort
Examples: see-saw, bottle opener, etc