Physics, 18.02.2020 16:15, jadeaguayo28

Two identical particles, each with a mass of 4.5 mg and a charge of 30 nC, are moving directly toward each other with equal speeds of 4.0 at an instant when the distance separating the two is equal to 2.5 cm. How far apart will they be when closest to one another.

The correct answer is 7.8 cm, but not sure how to do the problem.

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Two identical particles, each with a mass of 4.5 mg and a charge of 30 nC, are moving directly towar...