Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Edition
16
Electric Charge and Electric Field
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16-5 and 16-6: Coulomb's Law
16-7 and 16-8: Electric Field, Field Lines
16-10: DNA
16-12: Gauss's Law

Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 26
Q

What is the electric field strength at a point in space where a proton experiences an acceleration of 2.4 million “g’s”?

A
0.25 N/C0.25 \textrm{ N/C}
Giancoli 7th Edition, Chapter 16, Problem 26 solution video poster
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VIDEO TRANSCRIPT

This is Giancoli Answers with Mr. Dychko. Presumably the force the proton will experience at this point in space is only going to be due to the electrostatic force in which case electrostatic force will equal the net force. So the net force is mass times acceleration and we're told that it experiences an acceleration of 2.4 million g. So that's 2.4 times ten to the six times g. And then we can say electric field is that net force divided by the charge. So it's 2.4 times ten to the six mg divided by q. So 2.4 times ten to the six times 1.67 times ten to the minus 27 kilogram, mass of a proton, times 9.8 newtons per kilogram divided by 1.602 times ten to the minus 19 coulombs charge on a proton and we get 0.25 newtons per coulombs must be the strength of the electric field.

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