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Transformation of a Vector

  1. Feb 2, 2013 #1

    My question is from the book "Tensor Analysis" by Barry Spain. I am asked to show that how a vector transforms from rectangular Cartesian coordinates to polar coordinates. I have attached the question in jpeg format. I have came up with a solution but the angular component in my solution is r^2 times the angular component given in the book. I have checked some books about this subject and found out that both the solution given in the attachment and I have found exist. I am pretty confused about this and I assume that this book is wrong. I will be grateful if someone can provide some insight.

    Attached Files:

    • ss.JPG
      File size:
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  2. jcsd
  3. Feb 3, 2013 #2
    Any ideas ?
  4. Feb 3, 2013 #3


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    My guess: normalization question. Both answers may be right.
  5. Feb 4, 2013 #4
    Here is a solution based on using vector u_r = [cos(A) , sin(A)] and vector u_A = [-sin(A), cos(A)] normal to it. Edit: It appears the answer is not exactly the same.
    Last edited: Feb 5, 2013
  6. May 8, 2013 #5
    I just saw your post much later but I did not understand your argument.

    P.S The link is not accessible.
  7. Jun 12, 2013 #6
    The link was accessible and I saw the solution which is similar to mine though less detail is provided. The two answers differ by a factor of r and I think the solution in the link you suggest is the correct one, since it has the dimensions of acceleration and this is acceleration am I correct?
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