Calculating coulombs law in a capacitor?

[HMS-776]

Homework Statement

Each capacitor has a plate area of 5 inches, with a distance between the plates of 10mm. The capacitor has a total Q of .002 Coulombs.

Homework Equations

Coulombs law F=Ke X q1q2/r squared

The Attempt at a Solution

I do not know how to calculate coulombs law for a capacitor since coulombs law only describes the force between 2 points. Do I need to calculate the charge distribution first? How do I do that?

 

[Mindscrape]

Yeah, you can't use coulomb's law. You should find the electric field then use the fact that F=qE.