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 platfrom is f v, where v is its escape velocity from the surface of the Earth. The value of f is

The earth is assumed to be a sphere of radius R. A platform is arrange

1.	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 platfrom is f v, where v is its escape velocity from the surface of the Earth. The value of f is
Answer» `(1)/(SQRT(2))` `(1)/(3)` `(1)/(2)` `sqrt(2)` ANSWER :A