If a particle is acted upon by a constant force which is always normal to the direction of motion of particle , it is inferred that no work is done by the force since work done is given by
W =F. d =F*d cos theta
Since theta = 90° here and cos 90° = 0
So W =0
Question : Identify the incorrect statement for the universal law of gravitation.
Option 1: It is the force that binds us to the earth
Option 2: It is the force causing tides due to the stars and the earth
Option 3: It is the forces that assist the motion of the moon around the earth
Option 4: It is the force that keeps the motion of planets around the Sun
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