Net Electric Force

  • #1
30
1

Homework Statement


screen_shot_2015-02-04_at_7.27.36_pm.png
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In the above figure, if Q1 and Q2 are positive, where could a negative charge be placed and have a vertically upward net force on it?

Homework Equations


F = k|q||q| / (r^2)

The Attempt at a Solution


I wrote the force equations for the negative charge and both positive charges, but I have no idea how to proceed from there.
 

Answers and Replies

  • #2
30
1
Please do not reply, I have figured this out
 

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