Firefighter Mechanical Aptitude · Question
Scenario 6: When using a pry bar to lift a heavy object, moving the fulcrum closer to the object will:
Moving the fulcrum closer to the object (load) shortens the load arm and lengthens the effort arm. This increases the mechanical advantage, meaning less force i
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Question: Scenario 6: When using a pry bar to lift a heavy object, moving the fulcrum closer to the object will:
Answer options: ✅ Increase the force required to lift the object.
- Decrease the force required to lift the object.
- Have no effect on the force required.
- Increase the distance the object is lifted.
Correct answer: Increase the force required to lift the object.
Explanation: Moving the fulcrum closer to the object (load) shortens the load arm and lengthens the effort arm. This increases the mechanical advantage, meaning less force is required to lift the object. The correct answer is "Increase the force required to lift the object.". This capacity-fill scenario 6 reinforces the same competency for the firefighter-mechanical bank and follows the certified explanation standard.
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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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