Question

gravitational potential energy is the negative of work done by the gravitational force in raising the object to that height. here, what work is done by the gravitational force ?

Answer 1

$$\begin{gathered} WorkdoneisequaltothenegativeofPotentialEnergyinbringingaparticlefrominfinitetothesurfaceofEarth \\ W=-\frac{GMm}{r}-\frac{-GMm}{(r+h)}=\frac{-GMmh}{r(r+h)} \\ wherehistheheighttowhichobjectistoberaised. \end{gathered}$$