Hydroelectric power station takes its water from a lake whose level is at height of 50 metre above the turbine. Assuming and overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1MW. ( Take g = 10m/s2 )

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2000

kg per second on a turbine kept

100

m below the water level. Find kinetic energy of this water when it falls through a height of

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kg per second on a turbine kept

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m below the water level. Calculate the potential energy of water falling every one second at the highest point.

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