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Homework Help: Coulomb's law and drawing vectors

  1. May 29, 2007 #1
    1. The problem statement, all variables and given/known data
    Three charges are on the x~axis about five cm apart. Charge A is three micro C, charge B is negative four micro C, and charge C is five micro C. What is the effect on B?

    2. Relevant equations
    I have no idea how to solve this or the formula involved.


    3. The attempt at a solution

    Completely clueless, just would like to know how to solve it.
     
  2. jcsd
  3. May 29, 2007 #2
    Coulomb's law. Draw the force vectors calculated for both [tex]F_{a->b}[/tex] and [tex]F_{c->b}[/tex].

    [tex]F_{e}=\frac{Kq_{1}q_{2}}{r^{2}}[/tex]
     
  4. May 29, 2007 #3
    sorry i'm lost, i have no idea how to implement that. what are force vectors?
     
  5. May 29, 2007 #4
    Its ok. Did you draw a diagram? Start by drawing a diagram. I am assuming that A is on the left of B and B is on the left of C, right?

    Does A exert a force to the left or the right on B?

    How about C, does it exert a force to the left or the right on B?
     
  6. May 29, 2007 #5
    Hint: think opposites attract.. Which of the charges are positively charged? Which are negatively charged?
     
  7. May 29, 2007 #6
    how do you draw the diagram? i'm completely confused, you're talking to me in riddles. do you know of a website that shows step by step how to work these type of problems?
     
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