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How to calculate v=wr?

  1. Sep 16, 2015 #1
    Hi!
    seems crazy! but what if there is vx and vy?r is it a vector?
    w*r can be a cross product?
     
  2. jcsd
  3. Sep 16, 2015 #2

    mathman

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    Science Advisor
    Gold Member

    It would help if you defined your symbols.
     
  4. Sep 16, 2015 #3

    berkeman

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    Staff: Mentor

    This wikipedia article should help: https://en.wikipedia.org/wiki/Angular_velocity

    (see the part about particle motion in 3 dimensions...) :smile:
     
  5. Sep 16, 2015 #4
    yes, yes, means that v=wr gives v in one dimension, right!
    I want to calculate relative velocity, v1 = v + wr - ( v' + w'r' ) ; since that v is in 2d(v for x and y in euclidean space, as a vector velocity);
     
  6. Sep 16, 2015 #5

    berkeman

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    Staff: Mentor

    But the wikipedia page also shows the vector equation:

     
  7. Sep 17, 2015 #6
    isn't it like:
    v=w*r.perpendicular();
     
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