A particle of mass m is thrown upwards f...

A particle of mass `m` is thrown upwards from the surface of the earth, with a velocity `u`. The mass and the radius of the earth are, respectively, `M` and `R`. `G` is gravitational constant `g` is acceleration due to gravity on the surface of earth. The minimum value of `u` so that the particle does not return back to earth is

`sqrt(2gR^2`

`sqrt(frac(2GM)(R^2)`

`sqrt(frac(2GM)(R)`

`sqrt(frac(2gM)(R^2)`

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