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circular04.md

$\begin{align*} v^2 &= v_{x}^{2}+v_{y}^{2}\ &= (-r\omega,\sin,\omega t)^2+(r\omega,\cos,\omega t)^2\ &=r^2\omega^2,\sin^2,\omega t+r^2\omega^2,\cos^2,\omega t\ &=r^2\omega^2,(\sin^2,\omega t+\cos^2,\omega t)\ &=r^2\omega^2\ \therefore; {\mathstrut v} &= r\omega ;\cdots;(1);\Leftrightarrow; \omega = \frac{,v,}{r};\cdots;(2) \end{align*}$

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