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$-1.5 \times 10^2 \textrm{ N}$, $5.6 \times 10^2 \textrm{ N}$, $-4.2 \times 10^2 \textrm{ N}$

Giancoli 6th Edition, Chapter 16, Problem 12

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Chapter 16, Problem 12 is solved.

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can you work the odd problems from ch 16 please....particularly number 11

Thank you for your comment skewak, and the input is helpful. Quick tip on #11: express one charge in terms of the total, pick a random number for the total, and graph the quadratic to find it's maximum. It'll occur at 0.5Q. Each charge should be one half the total for a max force. If either charge is zero, that'll give the minimum force. Today I'm posting solutions (even's) to Ch 14 & 15... according to the survey: http://www.giancolianswers.com/odd-or-even-solutions-which-do-you-prefer, a majority of users want even solutions for a greater number of chapters, rather than all solutions for fewer chapters, so creating the even numbered videos is going to keep me busy for the next while. Good luck with your course!