Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 16 - Electric Charge and Electric Field - Problems - Page 470: 37

Answer

a) $F_{AT}=4.6\times10^{-10}N$ b) $F_{CG}=7.1\times10^{-10}N$ c) $\sum F=5.9\times10^{-5}N$

Work Step by Step

a) $F_{OH}=k\frac{(0.4e)(0.2e)}{1.8\times10^{-10}m}$ $F_{ON}=k\frac{(0.4e)(0.2e)}{2.8\times10^{-10}m}$ $F_{HN}=k\frac{(0.2e)(0.2e)}{2\times10^{-10}m}$ $F_{NN}=k\frac{(0.2e)(0.2e)}{3\times10^{-10}m}$ $F_{AT}=F_{OH}+F_{HN}-F_{ON}-F_{NN}=4.6\times10^{-10}N$ b) $F_{OH}=k\frac{(0.4e)(0.2e)}{1.9\times10^{-10}m}$ $F_{ON}=k\frac{(0.4e)(0.2e)}{2.9\times10^{-10}m}$ $F_{HN}=k\frac{(0.2e)(0.2e)}{2\times10^{-10}m}$ $F_{NN}=k\frac{(0.2e)(0.2e)}{3\times10^{-10}m}$ $F_{CG}=2F_{OH}+F_{HN}-2F_{ON}-F_{NN}=7.1\times10^{-10}N$ c) $\sum F=0.5\times10^5(F_{AT}+F_{CG})=5.9\times10^{-5}N$
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