What is the power developed by an engine in lifting water of 3000 liter from a well 20 m deep in one minute. (1 litre water = $10^{3} k g; g = 10 {m s}^{- 2}$ )?
Assume that there is no loss in the conversion of energy.

10

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100

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500

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1000

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Solution

The correct option is A $10$ kw
Power generated $= F . V F = 3000 g = 30 k N V = \frac{20}{60} \Rightarrow \frac{1}{3} m / s$

Power= $30 k N \times \frac{1}{3 m / s} = 10 k w$

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What is the power developed by an engine in lifting water of 3000 liter from a well 20 m deep in one minute. (1 litre water = 103kg ;g =10 ms−2 )?Assume that there is no loss in the conversion of energy.

The correct option is A 10 kwPower generated =F.VF=3000g=30kNV=2060⇒13m/s Power=30kN×13m/s=10kw

What is the power developed by an engine in lifting water of 3000 liter from a well 20 m deep in one minute. (1 litre water = $10^{3} k g; g = 10 {m s}^{- 2}$ )?
Assume that there is no loss in the conversion of energy.

The correct option is A $10$ kw
Power generated $= F . V F = 3000 g = 30 k N V = \frac{20}{60} \Rightarrow \frac{1}{3} m / s$

Power= $30 k N \times \frac{1}{3 m / s} = 10 k w$