A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant:- total energy throughout its orbit? Neglect any mass loss of the comet when it comes very close to the Sun.

A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant:- potential energy,

A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant:- kinetic energy,

A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant:- linear speed,

A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant:- angular speed,

A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant:- angular momentum,

Answer the following :- Comets move around the sun in highly elliptical orbits. The gravitational force on the comet due to the sun is not normal to the comet’s velocity in general. Yet the work done by the gravitational force over every complete orbit of the comet is zero. Why ?

A heavenly body revolves around a massive star in a highly elliptical orbit..Is its angular momentum constant over the entire orbit?

A planet is revolving round the sun in elliptical orbit. The maximum and minimum distances of the planet from the sun are 2 xx 10^2 m and 2 xx 10^10 m respectively. The speed of the planet when it is nearest to sun is 2 xx 10^15 ms^-1 What is the speed when it is farthest to the sun?

In what part of its orbit is the earth's potential energy greatest with respect to the sun? In what part of its orbit is its kinetic energy greatest ? Explain.