If an electric water pump has 4.9 kw power. How much water will the pump lift very minute to a height of 40 m? (g=9.8 m/s2 )
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Answer:
s2 is the correct answet
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Answer:
750 kg per minute
Explanation:
Power of pump=4.9 kw = 4.9×1000 = 4900
Time(t)=60s
Height(h)=40 m
g=9.8ms−2
We know,
Power=work done per unit time
Work done=mgh
=m×9.8×40
=392m
Power=100m ÷ time
4900=100m ÷ 60 second
4900 × 60 ÷ 100 = m
750 kg = m (mass)
Hence,pump can raise 750 kg water per minute up to 40 m height.
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