ch21-p011 - 11. With rightwards positive, the net force on...

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() 13 23 31 32 3 2 2 23 12 23 . qq FF F k k L LL =+= + + We note that each term exhibits the proper sign (positive for rightward, negative for leftward) for all possible signs of the charges. For example, the first term (the force exerted on q 3 by q 1 ) is negative if they are unlike charges, indicating that q 3 is being pulled toward
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