Prob. $3$ Air flows from a pipe into the region between two parallel circular disks as shown below. The fluid velocity in the gap between the disks is closely approximated by $V=V_0\frac{R}{r}($but uniform between the disks$),$ where $R$ is the radius of the disk, $r$ is the radial coordinate, and $V_0$ is the fluid velocity at the edge of the disk. Determine the acceleration for $r=0\mathrm{.}3$ and $0\mathrm{.}6$ m if $V_0=1\mathrm{.}5\frac{m}{s}$ and $R=0\mathrm{.}9m.(20\%)$

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Prob. $3$ Air flows from a pipe into the region between two parallel circular disks as shown below. The fluid velocity in the gap between the disks is closely approximated by $V=V_0\frac{R}{r}($but uniform between the disks$),$ where $R$ is the radius of the disk, $r$ is the radial coordinate, and $V_0$ is the fluid velocity at the edge of the disk. Determine the acceleration for $r=0\mathrm{.}3$ and $0\mathrm{.}6$ m if $V_0=1\mathrm{.}5\frac{m}{s}$ and $R=0\mathrm{.}9m.(20\%)$

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