Unformatted text preview: the right, for a net force of 60 N to the right. The middle negative charge is attracted towards the positive charge on the left and repeled by the negative charge on the right; these forces are the same magnitude of 48 N and both point to the left. The net force is then 96 N to the left. The negative charge on the right is repeled by the middle negative charge but attracted by the positive charge at the left; since the repulsion is 4 times as great in magnitude, these forces have magnitudes 48 N and 12 N, respectively, and the net force is 36 N to the right. Note that the sum of the three net forces is zero (60 N right plus 96 N left plus 36 N right), as required by Newton's third law....
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 Summer '08
 Fretwell
 Charge, Force, Electric charge, net force, middle negative charge

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