Question

Water flows over a section of Niagara Falls at
a rate of 2.1 × 106
kg/s and falls 59 m.
What is the power wasted by the waterfall?
The acceleration due to gravity is 9.8 m/s
2
.
Answer in units of W
power=energy per second = m g h / t = mass per second * g * h
= 2.1 * 10^6 * 9.81 * 59 = 1215 * 10^6 = 1.215 * 10^9 Joules (yikes ?)
Joules per second I mean (Watts)

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