First slide

Power

Question

From a waterfall, water is falling down at the rate of 100 kg/s on the blades of turbine. If the height of the fall is 100 m, then the power delivered to the turbine is approximately equal to

Moderate

A

100 kW
B

10 kW
C

1 kW
D

1000 kW

Solution

$P = (\frac{m}{t}) gh = 100 \times 10 \times 100 = 10^{5} W = 100 kW$

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