Explanation
In complete revolution change in velocity becomes zero, so average acceleration will be zero.
As the speed is constant throughout the circular motion, therefore its average speed is equal to instantaneous speed.
Work done in circular motion is always zero.
In complete revolution total displacement is zero, so average velocity is zero.
Due to centrifugal force
Because velocity is always tangential and centripetal acceleration is radial.
As body covers equal angle in equal time intervals. Its angular velocity and hence magnitude of linear velocity is constant.
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