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    Otherworlder's Avatar
    Otherworlder Posts: 1, Reputation: 1
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    #1

    Aug 30, 2006, 10:10 AM
    Help! Coupled differential for double pendulum system.
    I have two second order differential equations that describes a double pendulum system:

    y''[x] = g(y[w]-y[x])/a
    y''[w] = 2g(y[x]-y[w])/b

    I tried in mathematica

    DSolve[{y''[x] == g(y[w]-y[x])/a,y''[w] == 2g(y[x]-y[w])/b},{y[x],y[w]},x,w]

    but it didn't work. Can Mathematica actually solve that? I looked through the equation pages here and didn't find it either. Anybody has any ideas? I greatly appreciate the help
    LUNAGODDESS's Avatar
    LUNAGODDESS Posts: 467, Reputation: 40
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    #2

    Aug 30, 2006, 12:22 PM
    THERE IS THIS SOFTWARE THAT CAN help YOU FIGURE OUT THE PROBLEM... without giving the answer... THE WEBSITE address is:

    Www. Algebra-Help.com
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #3

    Nov 8, 2006, 03:34 AM
    Excuse me if I'm being dim, Luna, but this is a differential problem more than an algebraic one? - from what I can see that software has no calculus built in.

    To answer your question otherworlder, Mathematica should definitely be powerful enough to solve it for you, however I am not familiar with using it, so cannot help you.

    How about doing it the old fashioned way? ;)
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