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I have another question which is related to one I asked a couple of weeksago re: variable mass.
quote: "A stream of water impinges on a stationary 'dished' turbine blade.
This one is from Halliday Resnick and Walker, problem 10.17, which I
It is easy to understand why, as the change in velocity of the water is 2 v,
My students typically come up with F = u v, but the answer is F = 2 u v.
2 since delta v = 2v." Can someone help me with a better proof?
I have a strong aversion to mystifying physics by saying, "we multiply by
Thanks as always
Justin Parke
Oakland Mills High School
Columbia, MD