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A pump lifts 400 kg of water per hour a height of 4.5 m . Part A What is the minimum necessary power output rating of the water pump in watts? Express your answer using two significant figures. Part B
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A pump lifts 400 kg of water per hour a height of 4.5 m .

Part A
What is the minimum necessary power output rating of the water pump in watts?
Express your answer using two significant figures.
Part B
What is the minimum necessary power output rating of the water pump in horsepower?
Express your answer using two significant figures.

User Wiradikusuma
by
2.8k points

1 Answer

30 votes
30 votes

Answer:

Power = Work / Time

P = 400 kg * 9.8 m/s * 4.5 m / 3600 sec = 4.9 J/s = 4.9 Watts

Also, 4.9 Watts / (746 Watts / Horsepower) = .0066 Hp

User HyperQuantum
by
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