Interaction Energy of any system of particles is the work
done in assembling the system from the zero energy state against the
interaction forces of the system. In case of gravitational interaction energy
of a system of particles we consider zero energy state when the particles are
at very large separation or we consider at infinity.
To understand the Gravitational Interaction Energy, see the
video below:
To understand the calculation of Gravitational Interaction
Energy for a given system of particles, see the video below:
To study the applications of the concept in different
physical situations, see the example videos below: