Posted by sammeh on Friday, November 27, 2009 at 2:06pm.
Use Coulomb's law to get the force.
F = k Q1 Q2/R^2
The Q's are the two charges. R is the distance between the charges, which is sqrt [2^2 + 3^2]= sqrt13 cm
The direction of the force is along the vector from the 2*10^-6 charge to the 1*10^-6 charge, since it is a repulsive force.
Please show you work if you need further assistance
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