Suspending two small pith balls from a common support allows for a demonstration of Coulomb's Law, which states that the electrostatic force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. By charging the pith balls with an electrostatic generator, one can observe their mutual repulsion or attraction. If both pith balls are given the same type of charge (both positive or both negative), they repel each other. Conversely, if one is charged positively and the other negatively, they attract each other. The magnitude of the force can be qualitatively analyzed by observing the angle at which the pith balls repel or attract, demonstrating the inverse square law relationship of Coulomb's force.