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2E 10 A particle of mass 1 g and charge 2.5 x 104 Cis released from rest in an electric field of 1.2 x 10* NC. (a) Find the econe and the force of gravity acting on this particle. Can one of these forces be neglected in comparison with the other for approx mate analysis? (b) How long will it take for the particle to travel a distance of 40 cm? (C) What will be the speed of the particle after travelling this distance? (d) How much is the work done by the electric force on the particle during this periods Ans.(a) 3.0 N, 9.8 x 10-3N (b) 1.63 x 10-2 s (c) 49.0 ms (d) 1.20 J . . . 104 -1

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