The mean radius of the earth is R, its angular speed on its own axis is ωand the acceleration due to gravity at earth's surface is g. The cube of the radius of the orbit of a geostationary satellite will be
A
R2gω
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B
R2ω2g
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C
Rgω2
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D
R2gω2
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Solution
The correct option is DR2gω2 Orbitalvelocityv0=√GMr=√gR2randv0=rωThisgivesr3=R2gω2