Coulomb’s force law
You have a small metal sphere hanging from a thread and another sphere attached to a plastic handle. You charge one of the spheres and then touch it with the second sphere. Draw a force-versus-time graph for the force that one sphere exerts on the other as you move the sphere on the handle slowly and steadily away from the hanging sphere. What information do you need in order to determine the magnitudes of the quantities on the graph?
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