PURPOSE: To demonstrate and graph driven and damped harmonic motion.
DESCRIPTION: Variable speed motor can be run below, at, or above the resonant frequency of a mass hanging on the spring. Two masses are provided. Inserting a felt-tipped pen into the holder and starting the paper rolling allows you to graph the motion of the oscillating mass.
SUGGESTIONS:
REFERENCES: (PIRA 3A60.42) A large number of articles on this topic are listed in the Demonstration Reference File.
EQUIPMENT: Driven and damped vibration machine, as photographed.
SETUP TIME: None.
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