A cylindrical barrel s ft in diameter of weight w lb is floating in water as shown in
Chapter 1, Problem 18(choose chapter or problem)
A cylindrical barrel s ft in diameter of weight w lb is floating in water as shown in FIGURE 1.3.17(a). After an initial depression, the barrel exhibits an up-and-down bobbing motion along a vertical line. Using Figure 1.3.17(b), determine a differential equation for the vertical displacement y(t) if the origin is taken to be on the vertical axis at the surface of the water when the barrel is at rest. Use Archimedes’ principle: Buoyancy, or upward force of the water on the barrel, is equal to the weight of the water displaced. Assume that the downward direction is positive, that the weight density of water is \(62.4 \mathrm{lb} / \mathrm{ft}^{3}\), and that there is no resistance between the barrel and the water.
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