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Electron Suspended Between the Surface of The Earth

  1. Feb 20, 2010 #1
    1. The problem statement, all variables and given/known data

    An Electron remains suspended between the Earth (assumed nueutral) and a fixed positive point charge, at a distance of 6.37 m from the point charge.
    Determine the charge for this to happen.
    answer must be in C.
    2. Relevant equations
    g= 9.8 m/s^2
    Coulomb constant = 8/98755e9 N* m^2/C^2
    Kc= 8.99e9
    Fe= Kc (q1*q2)/r^2

    3. The attempt at a solution

    I am confused with this question,. please help me out
     
    Last edited: Feb 20, 2010
  2. jcsd
  3. Feb 20, 2010 #2
    What's the question asking for?
     
  4. Feb 20, 2010 #3
    it says

    determine the charge for this to happen
     
  5. Feb 20, 2010 #4
    Well think in terms of force of the condition that causes this equilibrium. Write down the equation for the two forces involved and the rest is just simple algebra (then a calculation when you stick the numbers in).
     
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