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Homework Help: Is the R the same?

  1. Mar 4, 2008 #1
    [SOLVED] Is the R the same?

    Question : Is the resultant vector of A + B - C the same magnitude in both drawings? I rearranged the vectors to form a different shape, but they would still have the same resultant vector, right?

    http://img150.imageshack.us/img150/826/38838600id4.gif [Broken]
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Mar 4, 2008 #2
    Yes, because essentially what you are doing in the first drawing is A + B + (-C), whereas in the second drawing you have B + (-C) + A.

    This is perfectly fine since vector addition is commutative (it doesnt matter what order the vectors are added in).
  4. Mar 4, 2008 #3
    Easy way to check is assign simple numbers to your variables.
  5. Mar 4, 2008 #4
    Thank you for the quick and accurate results.
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