Question

When earth is revolving around the sun, the gravitational work done by the sun

Answer 1

Explanation:

1 : When a planet revolves around Sun in an elliptical orbit, the work done Sun's gravitational force on the planet remains zero for any value of displacement.

and

2 : The mechanical energy of Sun planet system remains conserved throughout the motion of planet.

Answer 2

Answer:

Zero

Explanation:

Since, Earth return to the same place after each revolution, thus total work done will always be zero. There is only one force in the universe called Gravitational force which is Conservative, thus Work done by earth is zero, weather it is horizontal or of any shape.