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Right Hand Rule

  1. Jul 6, 2013 #1
    Hi,
    I have a question about how to apply the right hand rule in this vector (AxB)

    5PNOAT8.png

    I would say that it is -k (missing ^) because of the smallest angle is the one drawn in red, but it is k. Can anyone explain why?
     
  2. jcsd
  3. Jul 6, 2013 #2

    Doc Al

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    Staff: Mentor

    Draw the vectors with their tails at the same point.
     
  4. Jul 6, 2013 #3
    But the vectors are given as I draw
     
  5. Jul 6, 2013 #4

    Doc Al

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    Staff: Mentor

    True, but you must redraw them to properly apply the right hand rule. The vectors are both applied at the same point; redraw so that the tails of the vectors emanate from that point.

    By redrawing the vectors you are not changing them. You're just sliding the vector A over so that its tail coincides with that of vector B. Sliding vectors around does not change them, as long as they continue to point in the same direction.
     
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