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A 11.7 cm radius thin ring carries a uniformly distributed 15.4μc charge. A small 8.6g sphere with a charge of 1.5μc isplaced exactly at the center of the ring and given a very smallpush so it moves along the ring axis (+x axis)

How fast will the sphere be moving when it is 1.5 m from the centerof the ring (ignore gravity)?

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