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Homework Help: 3 Masses connected by springs

  1. Feb 12, 2014 #1
    1. There is a central mass Mc connected by two identical springs of spring constant k to two identical masses Mo.

    a) Set up and solve the equations for the two normal modes (the ones in the attached images) in which the masses oscillate along the line joining the centers.



    2. Relevant equations





    3. The attempt at a solution


    I don't know where to begin. The only examples of coupled mass-spring oscillations I have seen are the ones with 2 masses and 3 springs mounted to immovable walls.
     

    Attached Files:

  2. jcsd
  3. Feb 12, 2014 #2

    Simon Bridge

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    Science Advisor
    Homework Helper

    This one is done much the same way.
    Start with free body diagrams for each mass, work out the forces by Hook's law, get the resulting equation of motion.
     
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