F = kq1q2/r^2
Do for both and add noting they will have opposite direction because of the sign on the charges.
Three point charges, +6.5 μC, +1.8 μC, and −3.4 μC, lie along the x-axis at 0 cm, 1.7 cm, and 5.4 cm, respectively.
What is the force exerted on q1 by the other two charges? (To the right is positive.) The Coulomb constant is 8.99 × 109 N · m2/C2.
Answer in units of N.
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