The earth is moving around the sun in a circular orbit. If it is acted upon by . . .

Question : The earth is moving around the sun in a circular orbit. If it is acted upon by a force, then find the work done on earth by the force.

Doubt by Anshika

Solution : Work done will be zero because the angle between the force and the displacement along the tangent will be 90° and we know
W=FScosθ
W=FScos90° 

W=FS (0)
W = 0