Following a discussion in this forum, I have a question: Is it possible to derive Hooke's law from first principles? I think a purely electrostatic model is not adequate: Earnshaw theorem would imply there's no "relaxed" position. Also, electrostatic forces get weaker with increasing distance, the opposite trend of spring forces. Is my reasoning correct? Have I overlooked something? Is it possible to create a purely electrostatic model of elasticity?