Planar Kinematic Modelling Question

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dillonmhudson
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Homework Statement


Please see the picture shown below:

Homework Equations


I know the inertias of the AO and BO beams w/ respect to O are both 1/3*ml^2, but what are the inertias of AC and BC w/ respect to O?

The Attempt at a Solution


Any other hints that you guys have for solving a problem like this? I'm using Lagrangians.

Thanks in advance
 
Attachments
  • Textbook figure P5.44: a rhombus of four identical bars labelled l, m, with corners O at top, A and B at sides, and C at bottom; a spring k joins O to mass M hanging below C, with force F pulling down on M and angle theta marked at O.
    e070dcab.jpg
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dillonmhudson: You might consider using the parallel axis theorem.