$A$ particle is moving in $U.C.M.$ with speed $V$ and radius $R$. The angular acceleration of the particle is
- A$V^2/R$ perpendicular to the plane of the circle.
- B$V^2/R$ along the tangent to the circle.
- C$V^2/R$ along the radius towards the centre of the circle.
- Dzero.
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