Homework Help: Water falling = how much power?

1. Feb 2, 2009

Bigdane

Water flows over a section of a waterfall at the rate of 3.2 104 kg/s and falls 33 m. How much power is generated by the falling water?
watts

i tried to use the power equation but im just not sure how the numbers relate.

2. Feb 2, 2009

LowlyPion

You need to calculate the rate of potential energy delivery which is m*g*h/sec.

3. Feb 2, 2009

timon

use energy:

E$$_{gravitational}$$ before = E$$_{kinetic}$$ after

The gravitational energy of the water is turned into kinetic energy

the amount of power generated is the energy per second.

4. Feb 2, 2009

thanks guys