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MIT 8.02 Electricity and Magnetism, Spring 2002 10 Online
OpenStudy (anonymous):

Can anyone please solve this question for me? two positively charged ball are tied together by a string. one ball has a mass of 30 g and charge 1micro coulomb while the other has a mass of 40 g and charge 2 micro coulomb. the distance between them is 5 cm. when the string is cut, they move apart. when they are a long way from each other, how fast are they going?

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