The average acceleration vector for a part

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The average acceleration vector for a particle having a uniform circular motion is

A

A constant vector of magnitude $\frac{{{v^2}}}{r}$

B

A vector of magnitude $\frac{{{v^2}}}{r}$ directed normal to the plane of the given uniform circular motion

C

Equal to the instantaneous acceleration vector at the start of the motion

D

A null vector

The average acceleration vector for a particle having a uniform circular motion is

In complete revolution change in velocity becomes zero so average acceleration will be zero.