Question

When the earth is revolving around the Sun,
the gravitational work done by the Sun on
the earth for one complete revolution is
always:
Earth
Sun


a) cannot be determined b)positive
c)negative
d)zero
​

Answer 1

It is d) Zero

The work done by earth in moving around sun is zero. Because the centripetal force acting on the earth is perpendicular to the motion of earth.

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