Firefighter Mechanical Aptitude · Question
A firefighter is attempting to lift a heavy object. To minimize the effort needed, where should the firefighter position themselves relative to the object's centre of gravity?
Applying force directly above the centre of gravity minimizes torque that would tend to rotate the object, making it easier to lift without tilting.
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Question: A firefighter is attempting to lift a heavy object. To minimize the effort needed, where should the firefighter position themselves relative to the object's centre of gravity?
Answer options:
- As far away as possible. ✅ Directly above it.
- Below it.
- To one side, maximizing leverage.
Correct answer: Directly above it.
Explanation: Applying force directly above the centre of gravity minimizes torque that would tend to rotate the object, making it easier to lift without tilting.
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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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