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Average Resultant Force

  1. Nov 5, 2007 #1
    [SOLVED] Average Resultant Force

    Hi for this question

    What I try is
    Average Force
    but this is not one of the answers. Meaning it is wrong.

    May I know how to do this question?
  2. jcsd
  3. Nov 5, 2007 #2


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    Staff: Mentor

    Well one has to take the difference between two vectors which are orthogonal (90°). So find the resultant vector and divide by the time to obtain the average acceleration.


    Assume the truck's initial speed is 6 i m/s and it takes a right turn and has speed 4 j m/s, where i and j are unit vectors in the x and y directions
    Last edited: Nov 5, 2007
  4. Nov 5, 2007 #3
    Got it, thanks :) Using magnitude of vector to get the answer, it is c.
  5. Nov 5, 2007 #4


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    Staff: Mentor

    Correct! :cool:
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