Firefighter Mechanical Aptitude · Question
A rope is tied to a heavy box. Instead of pulling the box directly, a firefighter wraps the rope around a nearby tree (acting as a fixed pulley). How does this help?
A fixed pulley (like the rope around a tree) changes the direction of the applied force. While it doesn't reduce the magnitude of the force required, it allows
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Question: A rope is tied to a heavy box. Instead of pulling the box directly, a firefighter wraps the rope around a nearby tree (acting as a fixed pulley). How does this help?
Answer options: ✅ It changes the direction of the pulling force, making it easier to pull from a different stance.
- It reduces the amount of force needed to move the box.
- It increases the speed at which the box can be moved.
- It eliminates friction between the box and the ground.
Correct answer: It changes the direction of the pulling force, making it easier to pull from a different stance.
Explanation: A fixed pulley (like the rope around a tree) changes the direction of the applied force. While it doesn't reduce the magnitude of the force required, it allows the firefighter to pull from a more advantageous position, such as using their body 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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