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

My problem states that a pith ball hangs at 20 degrees from the verticle and weighs 3 grams. It is moved 10cm by a charged rod. They both have the same charge. It asks what is the charge on the ball in C and approximatley how many excess electrons are on the ball.

2. Relevant equations

I have the equation kqq/rsquared

3. The attempt at a solution

I found all the sides to the triangle and I do not know where to go from there. I do not know the charges so how can I use the equation with q in it?

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# Excess electrons question

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