The earth is assumed to be a sphere of 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_(e)`, where `v_(e)` is its escape velocity from the surface of the earth. Find the value of `f`.

`sqrt(2)`

`1/(sqrt(2))`

`1/3`

`1/2`

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