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A charged particle of mass 4.20 x 10^-2 kg and charge +7.60 x 10^-5 C moves from equipotential surface A, at a potential of 5950 V, to equipotential surface B, at a potential of 7950 V, under the influence of the existing electric field and an applied force. If the particle has a speed of 8.40 m/s on surface A and arrives at surface B with a speed of 8.80 m/s, how much work is done by the outside force in moving the particle from A to B? (This work is positive if energy is gained by the particle from interaction with the force and negative if energy is lost.)

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