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Three charges in a line (need help fast -please? (thanks))

  1. Oct 4, 2007 #1
    three charges in a line (need help fast --please? (thanks))

    1. The problem statement, all variables and given/known data
    Two charges Qc and -Qc(Qc = 6 µC) are fixed on the x-axis at x = -8 cm andx = 8 cm, respectively. A third charge Qb = 2 µC is fixed at the origin. (attached .gif file shows the diagram)

    A particle with charge q = 0.4 µC and mass m = 6 g is placed on the y-axis at y = 10 cm and released. There is no gravity.

    Calculate the initial acceleration of the particle.




    2. Relevant equations
    I calculated the y component of the acceleration no prob. (asuby = 120m/s/s)

    Im saying the x acceleration is zero, because all the acceleration is along the y-axis.
    this is wrong for some reason???

    Please help thanks!

    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Oct 4, 2007 #2

    Hootenanny

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    Staff Emeritus
    Science Advisor
    Gold Member

    Take note of the the signs of the two charges placed at (-8,0) and (8,0); one charge is Qc [i.e. positive] and the other is -Qc [i.e. negative]...
     
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