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Wind Energy

53.The blades...

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53.The blades of a windmill sweep out a circle of area A. If wind flows with a velocity v perpendicular to the blades of the windmill and its density is d, then the mechanical power received by the windmill?

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Q. The blades of a windmill sweep out a circle of area A. If the wind flows at a velocity v perpendicular to the circle and its density is

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, what is the mechanical power received by the windmill?

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perpendicular to the circle, then the mass of the air of density

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Q. 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

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Q. The blades of a windmill sweep out a circle of area A.
(a) If the wind flows at a velocity v perpendicular to the circle, what is the mass of the air passing through it in time t?
(b) What is the kinetic energy of the air?
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m^{2}

, v = 36 km/h and the density of air is 1.2 kg

m^{3}

. What is the electrical power produced?

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