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When water is sprayed a at a solid object weather flat or concave is the momentum exchange the same? Because when water hits the flat object it simply goes outward or perpendicular to the object but when it hits a concave object much of the water actually comes backward from the object.

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I don't know that there's much to say about this other than, no, it is different between these 2 cases. – AlanSE Sep 5 '11 at 17:56
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Can you rephase your question? It is extremely hard to make any sense of it. Maybe you could add a picture? – mbq♦ Sep 5 '11 at 17:59
He is asking if the shape of the object makes a difference in how much force is exerted by water, and the answer is clearly yes. – Ron Maimon Sep 5 '11 at 18:38
I've closed this as being too basic and too focused on one case when the principle is exceedingly general. If the OP can show us why this question is not just another application of the conservation of momentum we could re-consider the closure. – dmckee♦ Sep 5 '11 at 20:54

closed as too localized by dmckee♦ Sep 5 '11 at 20:53

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