The magnitude of gravitational potential energy of the moon earth system is U with zero potential energy at infinite separation. The kinetic energy of the moon with respect to the earth is K.

The gravitational potential energy of the Moon with respect to Earth is:

The gravitation potential energy of a body ( in earth's field) is minimm

Binding energy of moon and earth is :-

Binding energy of moon and earth is :-

Binding energy of moon and earth is :-

The magnitude of gravitational potential energy at a distance r from the centre of earth is U, then show the weight at this point in the form of U.

In a hydrogen atom, the electron and proton are bound at a distance of about 0.53 A. (a) Estimate the potential energy of the system in eV, taking the zero of the potential energy at infinite separation of the electron from proton. (b) What is the minimum work required to free the electron, given that its kinetic energy in the orbit is half the magnitude of potential energy obtained in (a)?