A wheelbarrow, where the load lies between the wheel (fulcrum) and the handles (effort), belongs to which class of lever?
Answer and explanation
Correct answer: C. Second-class lever
- Step 1: In a second-class lever, the load is positioned in the middle between the fulcrum and the effort. Step 2. Because the effort arm is always longer than the load arm, second-class levers always offer a mechanical advantage greater than 1. Answer: Second-class lever. Why not the others: First-class levers have the fulcrum in the middle; third-class levers have the effort in the middle (e.g. fishing rod).
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