Question

What is a lever? State its principle.

Answer 1

A lever is a 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

The principle of the Lever. It has been found by experiment that two equal forces acting in opposite directions, i.e., clockwise and counterclockwise, and applied to a uniform level at equal distances from the fulcrum counteract each other and establish a state of equilibrium, or balance, in the lever.