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 fv_(e ), where v_e 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 fv_(e ), where v_e is its escape velocity from the surface of the earth. The value of f is
Answer» `SQRT(2)` `(1)/(sqrt(2))` `(1)/(3)` `(1)/(2)` Answer :B