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Associated potential energy

  1. Sep 30, 2016 #1
    1. The problem statement, all variables and given/known data
    Picture: https://drive.google.com/open?id=0B39n6QfDU8f3bWY3OWxyaGZBYU0
    Fig1.jpg
    [Moderator: Image inserted to make problem statement visible]

    2. Relevant equations
    F=-dU/dx

    3. The attempt at a solution
    I have no idea in this question...
    The slope is always the same for the graph...
    Also, i have no idea how to link the graph to the equation...

    Thanks.
     
    Last edited by a moderator: Sep 30, 2016
  2. jcsd
  3. Sep 30, 2016 #2

    haruspex

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    Equations have context, and are meaningless without it. In that equation, what, precisely, do all the variables represent?
    Here's another equation: ##W=\int_{\vec a}^{\vec b}\vec F.\vec {dx}##, where W is the work done by a force ##\vec F##, a function of ##\vec x##, that moves from ##\vec x=\vec a## to ##\vec x=\vec b##.
    See if you can apply that as x moves a little to the right and left of point a.
     
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