The gravitational potential energy of a two particle system is derived in this chapter as `U=-(Gm_1m_2)/r`. Does it follow from this equation that the potential energy for `r=oo` must be zero? Can we choose the potential energy for `r=o` to be 20 J and still use this formula? If no what formula shoud be used to calculalte the gravitational potential energy at separation?

Why does the gravitational potential energy U(r) is always negative?

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.

What is potential energy ? Derive an equation for gravitational potential energy of a body of mass .m. at a height .h.. (AS_(1))

Gravitational potential energy of a body of mass m at a height of h above the surface of earth (M = mass of earth,.R = radius of earth) is:

A body of mass m is placed on Earth surface which is taken from Earth surface to a height h = 3R, then change in gravitaional potential energy is:

In a hydrogen atom, the electron and proton are bounded at a distance of about 0.53A (a) Estimate the potential energy of the system in eV, taking the zero of the potential energy at infinte separation of the electron from proton. (b) Whatis the minimum work required to free the electron? Given that its kinetic energy in hte orbit is half the magnitude of potential energy obtained in (a). (c) What are the answer to (a) and (b) above if the zero of potential energy is taken at 1.06A separation?

If a body is raised from the surface of the earth upto height R, what is the change in potential energy?

What will be the potential energy of a body of mass 67 kg at a distance of 6.6 xx 10^(10) m from the centre of the earth? Find gravitational potential at the earth? Find gravitational potential at this distance?