Question:
The power of an engine which draws 1000 kg of water from a well of depth 9 m in one minute is (acceleration due to gravity $g = 10$ m/s$^2$)
The power of an engine which draws 1000 kg of water from a well of depth 9 m in one minute is (acceleration due to gravity $g = 10$ m/s$^2$)
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To compute power, divide the total work done (mgh) by time in seconds.
Updated On: May 12, 2025
- 1.5 kW
- 1.5 W
- 150 W
- 15 kW
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The Correct Option is A
Solution and Explanation
Work done to lift water = $mgh = 1000 \times 10 \times 9 = 90000$ J
Time taken = 1 minute = 60 s
Power = $\dfrac{\text{Work}}{\text{Time}} = \dfrac{90000}{60} = 1500$ W = 1.5 kW
Time taken = 1 minute = 60 s
Power = $\dfrac{\text{Work}}{\text{Time}} = \dfrac{90000}{60} = 1500$ W = 1.5 kW
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