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Homework Help: Calculate force on point charges

  1. Dec 1, 2015 #1
    Find the force on 2Q and -Q/2

    2. Force between two point charges is given by : F = k.q1.q2 / d[2][/SUP]

    3. The attempt at a solution
    To find the force on 2q, I added the charges on left side and then calculated it using the formula.

    But how do we do it for -Q/2.

    Please guide me. Thanks
  2. jcsd
  3. Dec 1, 2015 #2


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    Same way. But we keep in mind that forces are vectors, with a magnitude and a direction.
  4. Dec 2, 2015 #3
    Yeah. Thanks
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