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# Physics/Question

Question
Hi...wondering if you could help me with this.

four point charges each 19.92uc are placed at the corners of a square 92.5cm on a side.  If 3 of the charges are positive and one is negative, find the magnitude of the force

experienced by the negative charge, The value of coulomb's constant is 8.98755x109 N . m2/C2  Answer in units of N.

Thank You,

Paul

F = kq1q2/r^2
If the negative charge is at the SW corner of the square, the forces due to the nearest charges are 4.17N and the force due to the diagonal charge is 2.09N.
So the net force down is 4.17+1.48 = 5.65N and that's the same force to the left.
The resultant force is 8.0N at an angle of 45 degrees
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Physics

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#### Richard J. Raridon

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