What commonly utilizes a first class lever?

A first-class lever is defined by having the fulcrum positioned between the effort and the load. This arrangement allows for a mechanical advantage, enabling the user to exert a smaller force over a greater distance to lift a heavier load.

Scissors exemplify a first-class lever because the fulcrum is located at the pivot point where the two blades cross. When you apply force to the handles (the effort), the blades move toward each other, allowing the user to cut materials effectively. The load, which is the material being cut, is positioned between where the effort is applied and the fulcrum. This design maximizes efficiency, making scissors a practical tool that utilizes the principles of first-class levers.

In contrast, other tools such as a wheelbarrow and a nutcracker do not fit this definition, as they represent different classes of levers. A wheelbarrow is a second-class lever where the load is between the fulcrum and the effort. Similarly, a nutcracker, while it seems to operate like a lever, actually functions more closely to a third-class lever arrangement. Tongs support a similar classification where the load is at one end and the effort is applied closer to the fulcrum.

Using this understanding