Two balls of polystyrene foam are about 4 cm from each other and repel with an electric force of 0.2 N. Find the values of the two charges knowing that one of the balls has a charge that is twice the other.
The Attempt at a Solution
0,2 = ( 9x109·2Q2 ) / (0,04)2
Q= +1,77 x 10-14
AND its wrong! The right answers should be :