The energy requierd to remove an earth satellite of mass `m` from its orbit of radius `r` to infinity is

The energy required to move an earth satellites of mass m from a circular orbit of radius 2 R to a radius 3 R is " " (R is radius of the earth)

The energy required to move an earth satellites of mass m from a circular orbit of radius 2 R to a radius 3 R is " " (R is radius of the earth)

If g is the acceleration due to gravity and R is radius of earth, the minimum kinetic energy required to make a satellite to move to infinity from orbit which is close to earth is