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The earth is assumed to be a sphere of radius R. A platform is arranged at a height R

The earth is assumed to be a sphere of radius R. A platform is arranged at a height R from the surface of the earth. The escape velocity of a body from this platform is fv, where v is its escape velocity from the surface of the Earth. The value of f is

Options

(a) (1/2)
(b) √2
(c) 1/√2
(d) (1/3)

Correct Answer:

1/√2

Explanation:

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