PURPOSE: To demonstrate electrostatic force.
DESCRIPTION: A pendulum isolated by a wooden vertical support is placed on top of a Van de Graaff. The pendulum bob becomes charged, experiences a repulsive force from the dome, and moves about erratically. Try other lengths to get different motion.
SUGGESTIONS:
EQUIPMENT: Van de Graaff generator, pendulum assembly.
SETUP TIME: 5 min.
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