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## Homework Statement

Calculate the net force on A.[/B]

## Homework Equations

F=k . (q1 q2)/r^2 , k=9 x 10^9 Nm^2/C^2[/B]

## The Attempt at a Solution

(9*10^9 Nm^2/C^2)(1,4 x 10^-6C)(7,2 x 10^-6C) / 1,7mm^2

= 0,0313.

Could someone tell me what I am missing even if what i did is even correct.

Thanks[/B]