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alever
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Homework Statement
The questions asks to consider the following comment about a situation where there are three point charges held fixed along a linear line.
"There will be zero net electric force on the charge in the middle due to the other charges. Using Coulomb's law, the force due to the +Q charge is positive, and the force due to the -Q charge is negative. The forces cancel."
It then asks if we agree with the statement, and to explain.
Homework Equations
Since we are dealing with Coulomb's law F=Kq1q2/r^2
The Attempt at a Solution
So there is a positive source charge (+Q) and a negative source charge (-Q) and there is a positive test charge (+q) place in the middle. I don't believe that there wouldn't be a net electric force on the charge in the middle, but I'm having trouble gathering my thoughts, or not sure where to start?