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Equations of motion using Lagrange

  1. Jul 14, 2014 #1
    Hi, my professor asked me to proove the equations of motion of a problem. The equations that I need to find are in page 2 of the file https://docs.google.com/file/d/0BxOdCfkh6FqpUlY5TktpbDZTc2M/edit , equations 7 and 8. But, I'm having trouble with the exercise.

    I uploaded my attemps. Problably I'm wrinting a wrong Lagrangian.. Does anyone have a clue about the right way? Sorry for my english, I'm not a native speaker. Thanks
     

    Attached Files:

  2. jcsd
  3. Jul 14, 2014 #2
    Can you please write your equations in latex as per forum rules?
    Than perhaps I will understand what you are asking, as the link provided leads me to a page that has no equations. (I couldn't turn the page.)

    For example, we can write the lagrangian of a system,$$\mathcal{L}(q, q', p, p')$$ by writing the following
    \mathcal{L}(q, q', p, p')
    If you prefer dot notation,
    $$\mathcal{L}(q,\dot{q},p,\dot{p})$$
    Where the dots are made by \dot{variable}
    Ie,
    $$\dot{a}$$
    Double dot can be done as well,
    $$\ddot{a}$$
    For more specific see the FAQ.
    Note: you must put "$$" at the beginning and end of the statement as it makes the forum recognize it as latex.
    Cheers,
     
    Last edited: Jul 14, 2014
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