A point charge q1=1.0•10-5 C with a mass m1=1.0•10-5 kg moves along the axis of a similarly charged ring. What is the minimum speed a point charge must have at a very large distance from the ring in order to fly through it? The mass of the ring is m2=2.0•10-5 kg, its radius R=5.0•10-2 m, and the charge value q2=3.0•10-5 C. The ring is not fixed and is initially at rest.
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