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Homework Help: Finding vectors in Cartesian Coordinates

  1. Sep 10, 2010 #1
    1. The problem statement, all variables and given/known data
    The vector V is given by V = (5.0x-12.0y )m. What is W such that V + W = -5|V|x?

    2. Relevant equations
    |v| = (vx2 + vy2)1/2

    3. The attempt at a solution
    I was unsure of what I did to subtract vector v- I know the negative vector has the same magnitude but opposite direction of the positive vector, but I wasn't sure how to express it. I wound up switching the signs to express that they were in different directions.

    w = -5 |v| xhat - v
    w = (-5)(13 m) xhat + (-5.0 xhat + 12.0 yhat)m
    w = (-70.0 xhat + 12.0 yhat) m
  2. jcsd
  3. Sep 10, 2010 #2


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    Homework Helper

    That looks correct to me.
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