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Homework Help: Kinematics - Vector DE

  1. May 5, 2014 #1


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    Kinematics -- Vector DE

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

    3. The attempt at a solution
    Here's their solution.


    I'm stuck on (b). The first and second lines are fine. But how do they get from the second line to the third line? And then in the fourth line, why are they integrating from u^2 to v^2?

    EDIT: Sorry for the image size.
  2. jcsd
  3. May 5, 2014 #2
    They make the substitution v2 = x.

  4. May 5, 2014 #3


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    That's it?! I thought x denoted position (as a function of time)! Was losing my mind over this. Thanks.
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