Firefighter Mechanical Aptitude · Question
When a firefighter stands on a high ladder rung, the ladder's stability is most affected by the distribution of the firefighter's weight relative to the ladder's attachment points. This relates directly to:
The position of the combined centre of gravity (firefighter and ladder) is critical. A higher centre of gravity reduces stability, making the ladder more prone
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Question: When a firefighter stands on a high ladder rung, the ladder's stability is most affected by the distribution of the firefighter's weight relative to the ladder's attachment points. This relates directly to:
Answer options:
- The ladder's material elasticity
- The coefficient of thermal expansion ✅ The centre of gravity
- The ladder's resonant frequency
Correct answer: The centre of gravity
Explanation: The position of the combined centre of gravity (firefighter and ladder) is critical. A higher centre of gravity reduces stability, making the ladder more prone to tipping.
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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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