(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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.

2. Relevant equations

F= (kq1q2)/r^{2}

3. The attempt at a solution

F= (k·Q·2Q)/r^{2}

0,2 = ( 9x10^{9}·2Q^{2}) / (0,04)^{2}

Q= +1,77 x 10^{-14}

AND its wrong! The right answers should be :

(+or-)188nC, (+or-)267nC

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# Homework Help: Two polystyrene balls, one has a charge twice the amount than the otherfind charges

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