- #1
Cisneros778
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Homework Statement
In a region of two-dimensional space, there are three fixed charges: +1 mC at (0, 0), -2 mC at (16 mm, -6 mm), and +3 mC at (-6 mm, 20 mm). What is the net force on the -2-mC charge?
-magnitude
-direction (° counterclockwise from the +x-axis)
Homework Equations
F = k*q1*q2 / d^2
The Attempt at a Solution
I got the magnitude correct. Fnetx: 8.77e07 N and Fnety: 5.71e07 N ; magnitude: 1.05e08 N. When I try to get the angle however my answer of 145 degrees is wrong. I don't understand why. I used arctan(Fnety/Fnetx).