Posted by Alyssa on Tuesday, January 15, 2013 at 10:41pm.
k=8.98755 × 10^9 =9•10 ⁹N • m^2/C^2.
q1=−6 µC, q2 =7 µC, q3 =-5 µC
F12=k•q1•q2/r1²=9•10⁹•6•10⁻⁶•7•10⁻⁶/9 =….
(to the right)
F13=k•q1•q3/r2²=9•10⁹•6•10⁻⁶•5•10⁻⁶/36 =…
(to the left)
F=F12-F13=…
(to the right)
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