Firefighter Mechanical Aptitude · Question
A firefighter uses a pry bar to open a stubbornly jammed door. If the fulcrum is placed between the effort and the load, what class of lever is being utilized?
In a first-class lever, the fulcrum is positioned between the effort force and the resistance (load), which is characteristic of crowbars or pry bars when used
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Question: A firefighter uses a pry bar to open a stubbornly jammed door. If the fulcrum is placed between the effort and the load, what class of lever is being utilized?
Answer options: ✅ First-class lever
- Second-class lever
- Third-class lever
- Compound lever
Correct answer: First-class lever
Explanation: In a first-class lever, the fulcrum is positioned between the effort force and the resistance (load), which is characteristic of crowbars or pry bars when used this way.
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- Scenario 1: Which simple machine uses a fulcrum to multiply force or change the direction of force?
- Scenario 2: If a hydraulic jack has a small piston with an area of 5 cm² and a large piston with an area of 50
- Scenario 3: Which of the following would require the MOST force to move?
- Scenario 4: A rope is tied to a heavy box. Instead of pulling the box directly, a firefighter wraps the rope a
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