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Homework Help: Vector from origin and two points/please explain how to solve it

  1. Sep 10, 2011 #1
    1. The problem statement, all variables and given/known data
    Consider two points located at r1 and r2, separated by distance r=(r1-r2). Find a vector A from the origin to a point on the line between
    r1 and r2 at distance xr from the point at r1, where x is some number
    2. Relevant equations

    3. The attempt at a solution
    I have no ideas about this question, what do I have to find? Please help me
  2. jcsd
  3. Sep 10, 2011 #2
    Drawing, or sketching the problem is always beneficial...
    I took the liberty of doing it for you;
    O-is the origin in this case... try figuring it out now, it should run along more smoothly...

    Attached Files:

    • S_1.JPG
      File size:
      7.1 KB
  4. Sep 10, 2011 #3
    Thanks a lot! But I can not understand a question. What should I find? Components of vector A? Or?
  5. Sep 10, 2011 #4
    Yes, you need to express A using what you've been given, i.e r, r1, r2, xr...
    Keep trying,
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