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Homework Help: Catenary Curve

  1. Nov 24, 2009 #1
    1. The problem statement, all variables and given/known data
    Hello ,
    Please look at question 2 (b).
    http://phstudy.technion.ac.il/~wn114101/hw/wn2010_hw05.pdf [Broken]

    I got that the lagragian is the potential energy (as in part a of the question)
    How Do I eliminate the lamda so I can write the U (wave) as requested?
    Or In Other word, How do I do b?
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Nov 24, 2009 #2
    Quick note: The Lagrangian is not the potential energy. It does have a potential term in it but it is not the potential energy; it is the difference between the kinetic energy and the potential energy.

    The problem looks pretty straightforward. If you expand [itex]\lambda[/itex] to the two terms inside the bracket and then combine the two integrals, you should get the form requested.
    Last edited by a moderator: May 4, 2017
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