Question

Why is the work done an object moving with uniform circular zero.​

Answer 1

Answer:

Work done on an object is the force applied and the displacement covered in the direction of the force applied.

W=FScosθ

Force in uniform circular motion is always perpendicular to the displacement and hence the angle between F and S is 900 always.  

Hence, The work done in a uniform circular motion is always zero.

Answer 2

In a uniform circular motion, the displacement is always zero, and if the displacement is zero, the work done will become zero.

W = FS Cosθ

(Where θ is angle between force and displacement)

In a circular motion, θ = 90°

Therefore, work done by the force is zero.