In a first-class lever, where is the fulcrum located?

In a first-class lever, the fulcrum is situated between the effort and the load. This arrangement allows for a balance where the effort applied on one side of the fulcrum can effectively move the load on the opposite side. The classic examples of first-class levers include a seesaw or a pair of scissors, where the fulcrum provides a pivot point, thus enabling the lever to function efficiently.

In contrast to other types of levers, where the fulcrum's position varies or is placed at different ends, the defining characteristic of a first-class lever is that the fulcrum remains centered between the input force and the output load, facilitating the needed mechanical advantage. This configuration is crucial for maximizing the efficiency of movement and work done in various physical activities.