Review problem. A light unstressed spring has length d.Two identical particles, each with charge q, are connectedto the opposite ends of the spring. The particles are heldstationary a distance d apart and then released at the sametime. The system then oscillates on a horizontal frictionlesstable. The spring has a bit of internal kinetic friction, sothe oscillation is damped. The particles eventually stopvibrating when the distance between them is 3d. Find theincrease in internal energy that appears in the springduring the oscillations. Assume that the system of thespring and two charges is isolated.
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