Which example best illustrates a class 3 lever?

Which example best illustrates a class 3 lever?

• A. Wheelbarrow
• B. Crowbar
• C. Tweezers
• D. Seesaw

Answer: (C)

A class 3 lever is characterized by the effort being applied between the fulcrum and the load. In the case of tweezers, when you squeeze the handles (the effort), the tips of the tweezers (the load) move closer together while the fulcrum is located at the pivot point near the base of the tweezers. This design allows for a greater range of motion and more precision in picking up small objects. In contrast, a wheelbarrow is an example of a class 2 lever where the load is located between the fulcrum and the effort; a crowbar is a class 1 lever with the load and effort on either side of the fulcrum; and a seesaw also represents a class 1 lever with the fulcrum in the center and the loads on either end. Thus, tweezers are the best illustration of a class 3 lever due to the position of the effort in relation to the load and fulcrum.

A class 3 lever is characterized by the effort being applied between the fulcrum and the load. In the case of tweezers, when you squeeze the handles (the effort), the tips of the tweezers (the load) move closer together while the fulcrum is located at the pivot point near the base of the tweezers. This design allows for a greater range of motion and more precision in picking up small objects.

In contrast, a wheelbarrow is an example of a class 2 lever where the load is located between the fulcrum and the effort; a crowbar is a class 1 lever with the load and effort on either side of the fulcrum; and a seesaw also represents a class 1 lever with the fulcrum in the center and the loads on either end. Thus, tweezers are the best illustration of a class 3 lever due to the position of the effort in relation to the load and fulcrum.