Which type of lever is characterized by the fulcrum being between the force and the resistance?

The type of lever characterized by the fulcrum being positioned between the force and the resistance is a first-class lever. In this configuration, the effort or force is applied on one side of the fulcrum while the resistance or load is on the opposite side.

A classic example of a first-class lever is a seesaw: the pivot point is in the middle, with one person applying force on one end and the weight on the other. This arrangement allows for a trade-off between the distance moved by the effort and the load, enabling beneficial mechanical advantage depending on the distances from the fulcrum.

In practical terms, first-class levers can enhance the efficiency of movement by allowing less effort to be used to lift a heavier load, as noted in applications involving skeletal muscles and bones in human movement.