Question

Work done on an object to bring it to certain point in space is called

Answer 1

Gravitational force acts towards the center. Here, while performing work, force is towards the center and displacement is also towards the center, then why is the work performed on the body considered negative? "As in work, W=−GM/r" where G is the gravitational constant, M is the mass of the Earth, r is the distance between the center of the Earth and the object. I understand the mathematical derivation(https://en.wikipedia.org/wiki/Gravitational_potential) but don't know the physical significance of negative sign.