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Homework Help: How do you read these vectors?

  1. Sep 8, 2011 #1
    How do you read these vectors??

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

    http://imageshack.us/photo/my-images/840/dsadasdi.png/

    2. Relevant equations

    ???

    3. The attempt at a solution

    For vector C, I was thinking that the - was simply a sign to denote the two different vectors, like , and vector D.

    So, for vector C, it's rectangle component would be (25î,30j) and vector D would be (-25î,-30j)? Am I right?
     
  2. jcsd
  3. Sep 8, 2011 #2

    lanedance

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    Homework Helper

    Re: How do you read these vectors??

    What's the question?
    for C
    25i + 30j
    the i represents a unit vector in the i direction (0,1)
    the j represents a unit vector in the j direction (1,0)

    so it becomes
    25i + 30j = 25(1,0) + 30(0,1) = (25,0)+(0,30) = (25,30)

    which means 25 in the positive x direction and 30 in the positive y direction or (25,30)
     
  4. Sep 8, 2011 #3

    NascentOxygen

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    Staff: Mentor

    Re: How do you read these vectors??

    vector C can be drawn in the 4th quadrant, extending from the origin to the point (25,-30)
     
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