Question

B)Why is the work done on an object moving with uniform
circular motion zero?
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Answer 1

Answer:

For the work done we need component of force along the direction of displacement but displacement and force are 90°, at each and every point on the circular track and therefore the component of force along the direction of displacement will always be zero in case of a body moving in a circular track or a body ...

Answer 2

Answer:

For an object moving in uniform circular motion, the only force is the centripetal force, which points in a direction along the radius of the circle, and since the radius of the circle never changes, there is no displacement along this direction, and the work done by this force is zero