A moving electron has kinetic energy K,. After a net amount of work W has been done

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A moving electron has kinetic energy K,. After a net amount of work W has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) Find W in terms of K.
(b) Does your answer depend on the final direction of the electron's motion?
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College Physics

ISBN: 978-0321601834

7th edition

Authors: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

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