A comet orbits the sun in a highly elliptical orbit. Does the comet have constant (a) linear speed (b) angular speed, ( c ) angular momentum, (d) kinetic energy, (e ) potential energy ,(f) total energy throughout its orbit ? Neglect any mass loss of the comet when it comes very close to the sun.

Answer

(a) not a constant, (b) not a constant , ( c ) constant ,(d) not a constant, ( e ) not a constant (f) constant.