Friday
August 1, 2014

Homework Help: Physics

Posted by Odd on Sunday, April 13, 2008 at 12:35am.

Water drives a waterwheel (or turbine) of radius 3.0m. The water enters at a speed of v1 = 7.0 m/s and leaves at a speed of v2= 3.0 m/s.
A) if 150kg of water passes through per second, what is the rate at which the water delivers angular momentum to the waterwheel? [answer: 1800 kg m^2/s^2]

B) what is the torque the water applies to the waterwheel? [answer: 1800 m N]

C)If the water causes the waterwheel to make on revolution every 5.5 s, how much power is delivered to the wheel?
[answer: 2100 w]

Can someone tell me what equations to use or how to approach this because I have no idea.

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