Young's Modulus and Internal Damping in a Vibrating Rod

H. M. Simpson
Paul J. Wolfe, Wright State University

Copyright © 1975, American Association of Physics Teachers. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Association of Physics Teachers. The following article appeared in the American Journal of Physics 43.6, and may be found at


A high‐Q mechanical oscillator in the form of a metallic rod with an eddy current driver is described. With this oscillator and a simple crystal transducer the characteristics of a mechanical oscillator can be easily studied and Young’s modulus for the metal can be found. With an inexpensive FM transducer system the internal damping of the metal can also be measured.