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Homework Help: Polar Kinematics

  1. Oct 31, 2006 #1
    If we have a position vector [tex] \vec{r} = x\vec{i} + y\vec{j} [/tex] why is the polar form of the equation [tex] r = r\vec{r} [/tex]? Don't we need two parameters to define a postition? And [tex] r [/tex] is the magnitude of [tex] \vec{r} [/tex]?

    Thanks
     
  2. jcsd
  3. Oct 31, 2006 #2
    The two parameters are [itex]r[/itex] and [itex]\theta[/itex].

    http://mathworld.wolfram.com/PolarCoordinates.html
     
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