A +100 μC charge is placed at the origin. A -50 μC is placed at x=2m and a +200 μC is placed at x= -4m.
What is the net electric force acting on the +100 μC charge?
F=F1+F2=kq1q2/r12+kq3q2/r22=F=F_1+F_2=kq_1q_2/r_1^2+kq_3q_2/r_2^2=F=F1+F2=kq1q2/r12+kq3q2/r22=
=9⋅109⋅200⋅10−6⋅100⋅10−6/42+=9\cdot10^9\cdot200\cdot10^{-6}\cdot100\cdot10^{-6}/4^2+=9⋅109⋅200⋅10−6⋅100⋅10−6/42+
+9⋅109⋅50⋅10−6⋅100⋅10−6/22=22.5 (N)+9\cdot10^9\cdot50\cdot10^{-6}\cdot100\cdot10^{-6}/2^2=22.5\ (N)+9⋅109⋅50⋅10−6⋅100⋅10−6/22=22.5 (N)
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