Firefighter Mechanical Aptitude · Question
A firefighter performs work by lifting a 20 kg hose bundle vertically by 1.5 metres. Approximately how much work is done?
Work = Force × Distance. Force = mass × gravity = 20 kg × 9.8 m/s² ≈ 200 N. Work = 200 N × 1.5 m = 300 J.
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Question: A firefighter performs work by lifting a 20 kg hose bundle vertically by 1.5 metres. Approximately how much work is done?
Answer options:
- 30 J ✅ 300 J
- 3000 J
- 150 J
Correct answer: 300 J
Explanation: Work = Force × Distance. Force = mass × gravity = 20 kg × 9.8 m/s² ≈ 200 N. Work = 200 N × 1.5 m = 300 J.
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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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