What is a fulcrum?

A fulcrum is a fixed point around which a lever pivots or rotates. It is the point at which the lever is supported or balanced when a force is applied to it. Fulcrums are commonly found in simple machines such as seesaws, scissors, and crowbars.

There are three types of fulcrums: first-class, second-class, and third-class. In a first-class lever, the fulcrum is located between the effort (the force applied) and the load (the object being moved). In a second-class lever, the load is located between the fulcrum and the effort. In a third-class lever, the effort is located between the fulcrum and the load.

Fulcrums play a crucial role in the functioning of many mechanical devices and tools, allowing for the efficient transfer of force and motion. They are essential components in the operation of many everyday objects and are fundamental to the principles of physics and engineering.