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Formula of curvature

  1. Jul 25, 2016 #1
    1. The problem statement, all variables and given/known data

    can someone explain how to turn the formula of curvature T'(t) / r'(t) into | r'(t) x r"(t) | / | (r't)^3 | ?

    2. Relevant equations


    3. The attempt at a solution
    my working is in 317.jpgT'(t) / r'(t) <blockquote class="imgur-embed-pub" lang="en" data-id="a/q3t1U"><a href="//imgur.com/q3t1U"></a></blockquote><script async src="//s.imgur.com/min/embed.js" charset="utf-8"></script>

    [PLAIN]http://imgur.com/a/q3t1U[/B] [Broken]
     

    Attached Files:

    • 316.jpg
      316.jpg
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      Views:
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    • 317.jpg
      317.jpg
      File size:
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      Views:
      32
    Last edited by a moderator: May 8, 2017
  2. jcsd
  3. Jul 25, 2016 #2

    BvU

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  4. Jul 25, 2016 #3

    berkeman

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    Staff: Mentor

    @chetzread -- Please post this in your other thread. Thank you.
     
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