Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Help with this vector element problem

  1. Sep 19, 2004 #1
    Vector A has x and y components of -8.40 cm and 16.0 cm, respectively; vector B has x and y components of 12.6 cm and -6.00 cm, respectively. If A - B + 3C = 0, what are the components of C?

    Not sure how to do this problem, I was thinking of adding the horizontal and vertical elements for A and B, but that wouldn't help in finding the components of C.
     
  2. jcsd
  3. Sep 19, 2004 #2

    Pyrrhus

    User Avatar
    Homework Helper

    You have a vector equation that will give two scalar equations.

    [tex] \vec{A} -\vec{B} + 3\vec{C} = 0 [/tex]

    [tex] A_{x} - B_{x} + 3C_{x} = 0 [/tex]
    [tex] A_{y} - B_{y} + 3C_{y} = 0 [/tex]
     
  4. Sep 19, 2004 #3
    thanks a lot, it was a whole lot simpler than I thought, I always seem to make physics problems more complicated than they should be lol
     
  5. Sep 19, 2004 #4

    Pyrrhus

    User Avatar
    Homework Helper

    No problem, :smile:
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook