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Unformatted text preview: x if q 3 > 0 and points towards + x if q 3 < 0. Therefore, with r 1 = 8 m, r 2 = 16 m and r 3 = 24 m, we have 0 = k q 1 q r 2 1 + k  q 2  q r 2 2 k q 3 q r 2 3 . Simplifying, this becomes 0 = 6 8 2 + 4 16 2 q 3 24 2 where q 3 is now understood to be in C. Thus, we obtain q 3 = 45 C....
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 Fall '08
 SPRUNGER
 Physics, Charge, Force

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