Wednesday
May 22, 2013

# Homework Help: Physics

Posted by Lisa on Friday, May 4, 2012 at 5:48pm.

What is the electric force of attraction between charges of 3 C and -4 C separated by a distance of 2 m?

• Physics - Elena, Friday, May 4, 2012 at 5:52pm

Coulomb’s Law
F = k •q1•q2/r²,
where
k =9•10^9 N•m^2/C^2,
q1 = 3 C,
q2 = |q2| = 4 C,
r =2 m

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