Homework Help: physics

Posted by jenny on Thursday, April 19, 2012 at 2:55pm.

Three point charges, +6.5 μC, +1.4 μC, and
−3.9 μC, lie along the x-axis at 0 cm, 1.8 cm,
and 5.3 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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