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Homework Help: Effective Mass of Cantilever beam (getting .36m instead of .23m)

  1. Oct 26, 2011 #1
    1. The problem statement, all variables and given/known data
    Im trying to find the equivalent mass of a beam so it can be modeled as a hanging point mass problem.

    Given the v = y_dot equation, y equation, and T

    Somewhere Im messing up with my math I believe as Im getting .36m instead of what I believe should be .23m.

    3. The attempt at a solution

  2. jcsd
  3. Oct 26, 2011 #2


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    Staff Emeritus
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    Check the expansion of the []^2 term in the sixth line of your calculation.
  4. Oct 26, 2011 #3
    Ha, thanks. Didn't think Id need a refresher on completing the square!

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