An electron is shot directly toward the center of a large metal plate that has surface charge

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An electron is shot directly toward the center of a large metal plate that has surface charge density –2.0 x 10-6 C/m2. If the initial kinetic energy of the electron is 1.60 x l0-17J and if the electron is to stop (due to electrostatic repulsion from the plate) just as it reaches the plate, how far from the plate must the launch point be?

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Fundamentals of Physics

ISBN: 978-0471758013

8th Extended edition

Authors: Jearl Walker, Halliday Resnick

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