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Basic Coulomb's Law Question

  1. Aug 22, 2013 #1
    1. The problem statement, all variables and given/known data

    Two point charges, q1 and q2, are seperated by a distance r. If the absolute value of q1 < the absolute value of q2, then

    a) The magnitude of the electric force that q1 exerts on q2 is greater than the magnitude of the electric force that q2 exerts on q1.
    b) The magnitude of the electric force that q1 exerts on q2 is less than the magnitude of the electric force that q2 exerts on q1.
    c). The magnitudes of the forces are equal.

    2. Relevant equations

    F=k(abs(q1q2)/r2

    3. The attempt at a solution

    I was thinking that the answer should be C. I'm not completely sure why. Is this correct? If so, how do you know?

    Thanks in advanced.
     
  2. jcsd
  3. Aug 22, 2013 #2

    PeterO

    User Avatar
    Homework Helper

    Simple:

    Newton's Third Law
     
  4. Aug 22, 2013 #3
    Oops, Duh! Thank you for the response, I wasn't thinking for a second there haha. :)
     
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