Firefighter Mechanical Aptitude · Question
A firefighter is using a system of two pulleys to lift a heavy object. One pulley is attached to the ceiling (fixed), and the other is attached to the load (movable). How much force is approximately needed, compared to the load's weight, to lift the object (ignoring friction)?
A system with one fixed and one movable pulley has a theoretical mechanical advantage of 2, meaning the effort force required is approximately half the load's w
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Question: A firefighter is using a system of two pulleys to lift a heavy object. One pulley is attached to the ceiling (fixed), and the other is attached to the load (movable). How much force is approximately needed, compared to the load's weight, to lift the object (ignoring friction)?
Answer options:
- Twice the load's weight ✅ Half the load's weight
- Equal to the load's weight
- One-quarter of the load's weight
Correct answer: Half the load's weight
Explanation: A system with one fixed and one movable pulley has a theoretical mechanical advantage of 2, meaning the effort force required is approximately half the load's weight.
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- 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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