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A metal ball with a mass of 3.81·10-6 kg and a charge of +5.21 mC has a kinetic energy of 4.77·108 J. It is traveling directly at an infinite plane of charge with a charge distribution of +4.73 C/m2. If it is currently 1.73 m away from the plane of charge, how close will it come to the plane before stopping?

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