Firefighter Mechanical Aptitude · Question
When extending a ladder against a building, what mechanical principle is most critical for ensuring its stability and preventing it from skidding or tipping?
Friction between the ladder's base and the ground, along with proper positioning of its centre of gravity, are vital for preventing the ladder from slipping or
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Question: When extending a ladder against a building, what mechanical principle is most critical for ensuring its stability and preventing it from skidding or tipping?
Answer options:
- Leverage and fulcrums ✅ Friction and centre of gravity
- Pascal's principle
- Bernoulli's principle
Correct answer: Friction and centre of gravity
Explanation: Friction between the ladder's base and the ground, along with proper positioning of its centre of gravity, are vital for preventing the ladder from slipping or toppling.
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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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