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Homework Help: Magnitude and direction of the force on the electron

  1. Nov 14, 2008 #1
    1. The problem statement, all variables and given/known data
    An electron is moving in a quadratic potential of the form V(x)=k(x-x0)^2, where k=10V/m^2 and x0=5m. x is positive to the right and negative to the left. Find the Following

    A. Find the magnitude and direction of the force on the electron at x = 0m

    B. Find the magnitude and direction of the force on the electron at x = 5m

    C. Find the magnitude and direction of the force on the electron at x = 10m


    2. Relevant equations


    3. The attempt at a solution

    My attempt was to plug in k and x into the equation V(x) = k(x-x)^2 but I am not getting the right answers, where am I going wrong? Do I need to use the equation F=k(q1q2)/d^2?
     
  2. jcsd
  3. Nov 14, 2008 #2

    Redbelly98

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    Staff Emeritus
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    Homework Helper

    You need to find (in your textbook or class notes) the relation between force and potential.
     
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