|Feb2-08, 01:55 PM||#1|
Excess electrons question
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?
|Feb2-08, 02:26 PM||#2|
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