What type of lever uses the fulcrum in the middle between the effort and load?

The correct type of lever that uses the fulcrum in the middle between the effort and the load is classified as a first-class lever. In this arrangement, the fulcrum acts as the pivot point, and the effort is applied on one side while the load is located on the opposite side. Classic examples of first-class levers include a seesaw or a pair of scissors, where moving one end results in action at the other end.

In a first-class lever, the position of the fulcrum allows for effective balancing of forces, enabling the operator to lift a heavier load with less effort by maximizing the mechanical advantage. Understanding this configuration is vital in scenarios involving mechanical systems, where leveraging forces enhances efficiency and productivity in operations—a key concept in advanced operational practices relevant to Industry 4.0.