Question

Water flows over a section of a waterfall at the rate of 5.1 104 kg/s and falls 40 m. How much power is generated by the falling water?
answer in Watts
thanks
P=5.1*10^4kg/s*9.8N/kg*40=1.9992*10^7J/s
= 1.9993*10^7 Watts.

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