Why was there only one damper in the mass/spring model?

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There were actually two dampers on the physical system that we used as a demostrator today in lecture, but the damper on mass 2 was tuned so that its damping was much less than that of the damper on mass 1; so the state-space model (which only had one damper) and the physical system behaved qualitatively the same.

--George Hines 15:33, 8 October 2007 (PDT)