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The windmill sweeps a circle of area A with their blades. If the velocity of the wind is perpendicular to the circle, find the air passing through it in time and also the kinetic energy of the air. of the wind energy is converted into electrical energy and and the density of the air is What is the electrical power produced?

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Area = A

Velocity

Density

(a) Volume of the wind through the windmill per sec is given by

Mass is given by

So,

Mass through the windmill in time will be

(b) kinetic energy is given by the relation

(c) Area is given as

Velocity is given as

Density of air si given as

Electric energy is of wind energy

kinetic energy

Power