- #1
las90
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Homework Statement
A point charge q1 = -3.00 µC is situated at the origin. Another point charge q2 = 5.00 µC is located at the location x = 1.00 m. If another charge Q1 = 10.0 µC is placed at x = -0.100 m, what is the magnitude of the force on it?
Homework Equations
F=[k(q1)(q2)]/r^2
E=F/Q (I'm not sure if this one is relevant, considering how I have no idea how to do this).
The Attempt at a Solution
For two particles, I did the same thing and it worked. However, when I tried with 3 particles, obviously it didn't give me the right answer or else I wouldn't be here?
F1= [(9x10^9)(10x10^-6)(-3x10^-6)]/(.1^2) = -27 i-hat
F2= [(9x10^9)(10x10^-6)(5x10^-6)]/(1.1^2) = -.37 i-hat
Fnet = -27 i-hat + -.37 i-hat = -27.37 i-hat.
Meaning the magnitude would be 27.37 N, and it would be going in the negative i-hat direction. Of course, that was not the right answer, and I was really hoping for some help because I have no clue what to do.
Thank you!