Which of the following is an example of a third class lever?AarmBtweezersCstaplerDall of the above

Break Down the Problem

1. Identify what a third-class lever is.
2. Examine each option (A, B, C, D) to determine if it fits the definition of a third-class lever.

Relevant Concepts

• Third-Class Lever Definition: In a third-class lever, the effort is applied between the fulcrum and the load. This means the effort moves a shorter distance than the load, allowing for a greater speed or distance of the load in the opposite direction.

Analysis and Detail

1. A: Arm - The elbow acts as a fulcrum, your bicep applies the effort between the elbow (fulcrum) and the weight in your hand (load). This is a third-class lever.
2. B: Tweezers - When using tweezers, the pivot point (fulcrum) is near one end, while the effort is applied between the fulcrum and the load picked up. This also represents a third-class lever.
3. C: Stapler - In a stapler, the pivot point is where the stapler arm meets the base. The effort is applied to the arm, and the staples are the load. This functions as a third-class lever as the effort is between the fulcrum and the load.
4. D: All of the above - Since all three examples qualify as third-class levers, this option indicates that every option could potentially represent a third-class lever.

Verify and Summarize

All the examples given (A: arm, B: tweezers, C: stapler) qualify as third-class levers because in each case, the effort is between the fulcrum and the load.

Final Answer

D: All of the above