Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Physics homework help please?
A proton with an initial speed of 680,000 m/s is brought to rest by an electric field.
What was the potential difference that stopped the proton?
What was the initial kinetic energy of the proton in electron volts?
1 Answer
- ?Lv 51 decade agoFavorite Answer
a. Work done by electric field W = k.e. of proton K
q * V = (1/2) * m * v2
1.6 * 10-19 * V = 0.5 * 1.66 * 10-27 * 8000002
Potential difference V = 5.31 * 10-16 / 1.6 * 10-19 = 3318.75 V
b. k.e. of proton in eV = V (numerically) = 3318.75 eV
Hope that help :)
