Firefighter Mechanical Aptitude · Question
A firefighter uses a long wrench to tighten a bolt. Why is a longer wrench more effective for this task?
Torque is calculated as force multiplied by the lever arm distance. A longer wrench increases the lever arm, allowing the same force to produce greater torque,
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Question: A firefighter uses a long wrench to tighten a bolt. Why is a longer wrench more effective for this task?
Answer options:
- It reduces the force of friction. ✅ It increases the leverage, allowing more torque with less effort.
- It decreases the weight of the tool.
- It provides a better grip.
Correct answer: It increases the leverage, allowing more torque with less effort.
Explanation: Torque is calculated as force multiplied by the lever arm distance. A longer wrench increases the lever arm, allowing the same force to produce greater torque, or a smaller force to achieve the required torque.
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Question explanations
- 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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