PURPOSE: To demonstrate resonance absorption of wave energy by a mass-on-spring system.

DESCRIPTION: Sending a wave along the machine drives the spring-mass attached to one of the crossarms. The greatest effect will be at the resonant frequency for the mass on the spring. A well chosen driving frequency will result in almost complete absorption of the wave.

SUGGESTIONS: See Demonstration Reference File for sample data. The manual written by Shive contains excellent information on both the theory and the use of the wave machine; copies are available in the Lecture-Demonstration office.

REFERENCES: (PIRA 3B22.30)See Demonstration Reference File for further information and experiments.

EQUIPMENT: Shive Wave Machine, 2 brass crossarm counterweights, spring, masses, and wave generator.

SETUP TIME: None.