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

Easy

A

100 kW
B

10kW
C

1kW
D

1000 kw

Solution

power = $\frac{mgh}{t} = \frac{100 \times 10 \times 100}{1} = 100 x 1000 W = 100 kW$

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