A satellite of mass m is orbiting the earth at a height 'h' from its surface. If M is Mass of the earth and R its radius then how much energy must be spent to pull the satellite out of the earth's gravitational field?

Question

$$(a)\;\frac{2GmM}{(R+h)^2} \quad (b)\;\frac{GmM}{2(R+h)^2} \quad (c)\;\frac{2GmM}{(R+h)}\quad (d)\;\frac{GmM}{2(R+h)}$$