If the gravitational potential energy of two point masses infintely away is taken to be zero then gravitational potential energy of a galaxy is

Choose the correct alternative : (a) If the gravitational potential energy of two mass points infinite distance away is taken to be zero, the gravitational potential energy of a galaxy is (positive /negative/zero). (b) The universe on the large is shaped by (gravitational/electromagentic) forces, on the atomic scale by (gravitational/electromagnetic) forces, on the nuclear scale by (gravitational/electromagnetic/strongnuclear) forces.

Define gravitational potential energy.

What is gravitational potential energy ?

What is gravitational potential energy?

Define: Gravitational Potential energy