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Hooke's law and the Coulomb force
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[QUOTE="Chestermiller, post: 4497771, member: 345636"] To elaborate on rude man's answer, if you are going to use energy considerations, you need to recognize that in the initial state, you need to have an externally applied force to hold the charges in place. As you ease up on this force, the spring stretches and the charges get farther apart. Your missing energy is the work done on the external agent as you ease up on the force. [/QUOTE]
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Introductory Physics Homework Help
Hooke's law and the Coulomb force
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