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The mass of air striking the blades of ...

The mass of air striking the blades of a windmill every second is 400 kg . The velocity of the wind is `20 m*s^-1`. What is the rate of storage of energy in the windmill (in kW unit)? How much water can be raised per second , up to a height of 5m, using the windmill?
`g=10 m*s^(-2)`.

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The correct Answer is:
80 kW , 1600 kg
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CHHAYA PUBLICATION-WORK AND ENERGY-PROBLEM SET -II
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