I WONDER - What Is A Lever?

A lever is a simple machine consisting of a rigid bar that pivots around a fulcrum, providing mechanical advantage to lift heavy objects with less effort. Examples include seesaws and crowbars. Levers are categorized into three types based on the positions of the fulcrum, effort, and load. They are prevalent in everyday tools like scissors and pliers, and even in biological systems, such as the human arm, where the elbow acts as a fulcrum.

What new insight or understanding did you gain from this video?