In an elliptical orbit under gravitational force, in general

A satellite is revolving round the earth in an elliptical orbit, then (a) gravitational force exerted by the earth is equal to centripetal force at same point only ( b) power associated with gravitational force is zero at every point (c) workdone by gravitational force is zero in some small parts of the orbit (d) at some points, the magnitude of gravitational force is greater than that of centripetal force

. (A): Comets move around the sun in elliptical orbits. The gravitational force on the comet due to sun is not normal to the comet.s velocity but the work done by the gravitational force over every complete orbit of the comet is zero (R): Gravitational force is a non conservative force.

Statement-1:Comets move around the sun in elliptical orbits, the gravitational force on the comet due to sun is not normal to the comet's velocity, but the work done by the gravitational force over every complete orbit of the comet is zero. Statement-2: Gravitational force is a conservative force and the work done by a conservative force over a closed path is always zero.