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 isn't the easiest subject for me 1 question help ):?
1.What is the electric force between a +2 µC point charge and a –2 µC point charge if they are separated by a distance of 5.0 cm? Show your work. (µC = 1.0 × 10–6 C)
1 Answer
- civil_av8rLv 77 years agoFavorite Answer
Definition of electrical force:
F = k*q1*q2 / r^2
q1 = +2 * 10^-6 C
q2 = -2 * 10^-6 C
k = 9 * 10^9 N*m^2/C^2
r = 5.0 cm <--- Need to convert to 'm' so the units cancel in 'k'
r = 0.050 m
Plug in your numbers
I got
F = 14.4 N
Now, since they are opposite charge, the force points towards each other. I inputted q2 as a positive number. Inputting in q2 = -2*10^-6 would have given a negative answer. In lieu of a direction, the negative means nothing. The magnitude stays the same.