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A very small sphere with positive charge q=+ 7.00 μC is released from rest at a...

A very small sphere with positive charge q=+ 7.00 μC is released from rest at a point 1.70 cm from a very long line of uniform linear charge density λ=+ 4.00 μC/m . What is the kinetic energy of the sphere when it is 3.70 cm from the line of charge if the only force on it is the force exerted by the line of charge?

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