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Vectors with constants

  1. Sep 10, 2011 #1
    Let a[itex]\vec{A}[/itex]+ b[itex]\vec{B}[/itex] + [itex]\vec{C}[/itex] = 0, where [itex]\vec{A}[/itex] = (75, -60), [itex]\vec{B}[/itex] = (-16, 60), and [itex]\vec{C}[/itex] = (84,16). I need to find the value of a and b. I really have no idea where to start with this problem any help would be great!
     
  2. jcsd
  3. Sep 10, 2011 #2

    Hootenanny

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    Welcome to Physics Forums.

    You have two equations, with two unknowns. How do you suppose you could solve them?
     
  4. Sep 10, 2011 #3
    So far I found the magnitude of the resultant displacement. (Rx = 144, Ry = 16, [itex]\vec{R}[/itex] = 144.886)
     
  5. Sep 10, 2011 #4

    Hootenanny

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    The magnitude of the resultant vector is zero, by definition.

    How do you normally solve systems of simultaneous equations?
     
  6. Sep 10, 2011 #5
    i don't know. can you give me an example?
     
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