A charge of -401 c is fixed in place from a horizontal, Ask an Expert

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A charge of -4.01 ?C is fixed in place. From a horizontal distance of 0.0392 m, a particle of mass 7.24 x 10-3 kg and charge -8.81 ?C is fired with an initial speed of 80.9 m/s directly toward the fixed charge. What is the distance of closest approach?

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