A particle $A$ moves along a circle of radius $R = 4.5 ext{ m}$. A fixed point $O$ lies on the ci

Question

A particle $A$ moves along a circle of radius $R = 4.5 	ext{ m}$. A fixed point $O$ lies on the circumference of the circle. The radius vector $\mathbf{r}$ of the particle relative to $O$ rotates such that its angle $	heta$ with the fixed diameter passing through $O$ varies with time $t$ as $	heta = t^2/3$ radians.

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