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A metal ball with a mass of 2.97·10-6 kg and a charge of +4.91 mC has a kinetic energy of 6.81·108 J. It is traveling directly at an infinite plane of charge with a charge distribution of +3.43 C/m2. If it is currently 1.71 m away from the plane of charge, how close will it come to the plane before stopping?

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