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Question

The average acceleration vector for a particle having a uniform circular motion in one complete revolution.
  1. v2r in magnitude and perpendicular to the plane of circle
  2. A constant vector of magnitude v2r
  3. Equal to the instantaneous acceleration vector at the start of the motion
  4. A null vector

A
Equal to the instantaneous acceleration vector at the start of the motion
B
A constant vector of magnitude v2r
C
A null vector
D
v2r in magnitude and perpendicular to the plane of circle
Solution
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The average acceleration vector will be a null vector , since in one complete round the displacement is null vector which implies that average velocity is also null vector which further implies that average acceleration will also be a null vector for a particle having a uniform circular motion.

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