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Homework Help: Vector x components help

  1. Feb 13, 2005 #1
    I have a question. Vector A has x and y components of -20cm and 15 cm, respectively; vector B has x and y components of 10.9cm and -20 cm, respectively. If A - B + 3C = 0, what is the x component of C?

    I found out that C = -0.73 cm but thats not what the question is asking.
  2. jcsd
  3. Feb 13, 2005 #2


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    Use the "x" and "y" components of A, B, and C and solve for the required quantities:

    A_x - B_x + 3C_x = 0
    A_y - B_y + 3C_y = 0

    Last edited: Feb 13, 2005
  4. Feb 13, 2005 #3


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    He/She only needs he first equation...

  5. Feb 13, 2005 #4
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