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A 2.2-in.-diameter rod weighing 3.6 lb per foot of length falls coaxially inside a tube with a 2.210 in . inside diameter. The gap between the rod and the shaft is filled with SAE 10 W oil at \( 20^{\circ} \mathrm{C} \).
What is the rod's terminal velocity?
\[
u_{\text {term }}=\mathbf{i} 17.05 \mathrm{ft} / \mathrm{s}
\]
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