Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Curvature and Torsion

  1. Sep 27, 2011 #1
    1. The problem statement, all variables and given/known data

    http://www.mathhelpforum.com/math-help/attachments/f6/22423d1317129472-curvature-torsion-untitled.png [Broken]

    3. The attempt at a solution

    What I did was I calculated the unit vector for dN/ds={.21i+0.91j-0.42k}/ sqrt(.21^2+.91^2+0.42^2)=.205i+0.889j-.4102k

    then, I took a derivative of N

    since N=BxT,

    then taking T and doing dot product on both sides:
    T⋅(dN/ds)=T⋅(dB/ds)xT+Bx(dT/ds) which simplifies to:

    From here I have no clue what I should be doing..

    Any suggestions will be greatly appreciated
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Sep 27, 2011 #2
    nvm figured it out
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook