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Homework Help: Did i take this derivative of the vector right?

  1. Oct 13, 2005 #1
    Last edited by a moderator: Apr 21, 2017
  2. jcsd
  3. Oct 13, 2005 #2

    Pengwuino

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    Check that domain section...
     
  4. Oct 13, 2005 #3
    ahh should be r >0 right? is the derivative right too? thanks!
     
  5. Oct 13, 2005 #4

    Pengwuino

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    No. Look what happens to the i vector when you have t=3
     
  6. Oct 13, 2005 #5
    oh f word....
    can i say, t < 0?
     
  7. Oct 13, 2005 #6

    Pengwuino

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    Well, the thing is that it can go above 0... but how far?

    Start looking at the equations and ask yourself where each one has a valid result. For example, the i component can be t=<2
     
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