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Mass-Spring-Wall System

In a physical situation, if two elements are connected in such a way that they share a common velocity, then they are in series. An example is a mass connected to one end of a spring, where the other end is attached to a rigid support, and the force is applied to the mass, as shown in Fig. 7.7.

Figure 7.7: A mass and spring combined as one-ports in series.
Figure 7.8 shows the electrical equivalent circuit corresponding to Fig.7.7.
Figure: Electrical equivalent circuit of the series mass-spring driven by an external force diagrammed in Fig.7.7.
Figure: Impedance diagram for the force-driven, series arrangement of mass and spring shown in Fig.7.7.

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Parallel Combination of One-Ports
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Series Combination of One-Ports