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A problem involving hybrid component forms

  1. Sep 1, 2011 #1
    1. The problem statement, all variables and given/known data

    Okay, I'm reopening this question because I didn't understand it as well as I thought I did.

    "a) Write r-hatc and phi-hat in hybrid component form ( )i + ( )j where the parentheses represent polar coordinate expressions.

    b) Now use these hybrid expressions to take the derivatives of r-hatc and phi-hat, as hybrid expressions, and then re-express them in terms of polar coordinates only."

    2. Relevant equations

    dr = (r-hat)dr + (theta-hat)r*d(theta) (Maybe? I'm not too sure.)

    3. The attempt at a solution

    I'm not exactly sure what to do or how to do it. If anyone could help get me started, at least, I'd appreciate any help given!
  2. jcsd
  3. Sep 2, 2011 #2


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    Homework Helper

    My hint would be to forget about part b (and, indeed, about derivatives) until you've completed part a.

    Try drawing a picture showing the various unit vectors involved.
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