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Math Help - Torsion - Vector Algebra - urgent kinda

  1. #1
    Member Altair's Avatar
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    Unhappy Torsion - Vector Calculus - urgent kinda

    Question :- Find the torsion of C : r(t) = [t, t^2, t^3]

    Strategy :- First convert into r(s). Then find u(s) (unit tangent vector). Then find the b(s) (unit binormal vector). Then take its derivative and game is up.

    Problems :- But....a biiiig BUT....I am stuck ....Till now I have done problems in which there were equations of circles and elipses etc and it was easier to convert them into parametric form and then conert into r(s)...here I am atuck with these ts....

    Questions :- 1. How do I write the parametric forms and convert them from t to s ?
    2. How do I find the unit normal vector vector with which I have to cross the unit tangent vector ?

    Please take your time answering cuz I am stuck really bad....Thanks a lot...
    Last edited by Altair; November 22nd 2008 at 06:04 AM.
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  2. #2
    Member Altair's Avatar
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    Still no luck with the conversions...Though I found out a pre-defined formula for it but its not the point.
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