Moderate
To pump up 2400 kg of water up 74.6 m in 5 minutes, the required in horse power is:
Correct answer: A. 8 hp
- A. 8 hp
- B. 15 hp
- C. 25 hp
- D. 16 hp
Explanation
P = (2400)(10)(74.6) / 300 watt = (2400)(10)(74.6) / (300)(746) hp= 8 hp (1 hp = 746 watt)
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About Work and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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