Answer to Question #55930 in Classical Mechanics for Preet

Question #55930

The blades of a wind mill sweep out a circle of area A.If wind flows with velocity v perpendicular to blades of wind mill and its density is D,then the mechanical power received by wind mill is
(a) (DAv^3)/2
(b) DAv^3
(c) (DAv^2)/2
(d) 2DAv^2

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