Firefighter Mechanical Aptitude · Question
How does increasing the diameter of a wheel on a wheel and axle system (while keeping the axle diameter constant) affect its mechanical advantage?
For a wheel and axle, mechanical advantage is the ratio of the wheel's radius to the axle's radius. Increasing the wheel's diameter (and thus its radius) while
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Question: How does increasing the diameter of a wheel on a wheel and axle system (while keeping the axle diameter constant) affect its mechanical advantage?
Answer options: ✅ Increases mechanical advantage.
- Decreases mechanical advantage.
- Has no effect on mechanical advantage.
- Changes the direction of force only.
Correct answer: Increases mechanical advantage.
Explanation: For a wheel and axle, mechanical advantage is the ratio of the wheel's radius to the axle's radius. Increasing the wheel's diameter (and thus its radius) while keeping the axle constant will increase this ratio, thereby increasing the mechanical advantage.
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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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