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    Help with a SDOF system, spring and base?

    Homework Statement Homework Equations Maybe the step response equation? The Attempt at a Solution I don't really understand the difference between a and b, but he said part a was supposed to be quite easy. Is a just: mx'' = -k(x-y) - c(x' - y') or something along those lines...
  2. L

    Calculating a moment required, using radius of gyration and parallel axis theorem

    Homework Statement Homework Equations radius of gyration: r = root (I/m) I = moment of inertia m = mass parallel axis theorem given above The Attempt at a Solution Okay, so I think the moment about CM is just m*0.24^2, but after that, I'm less sure. Is the moment about the hip just...
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