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\centerline{Central Forces}
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\centerline{\bf Velocity and Acceleration in Polar Coordinates}

\begin{enumerate}
\item Find $\dot{\hat r}$ and $\dot{\hat \phi}$ in terms of $\hat r$ and $\hat
\phi$.
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\item  Find $\vec v$ and $\vec a$ in terms of $\hat r$ and $\hat \phi$.
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\leftline{\it Corinne Manogue}
\leftline{\copyright 1999 Corinne A. Manogue}
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