3A60.40 - Driven Resonance - Pasco Oscillator and Rotating Mass on a Spring

Code Number:
3A60.40
Demo Title:
Driven Resonance - Pasco Oscillator and Rotating Mass on a Spring
Condition:
Good
Principle:
Simple Harmonic Motion
Area of Study:
Acoustics
Equipment:
Pasco Harmonic Motion Machine, Masses for Machine (2 of them and 50 g each), and Rotating Mass on a Spring App.
Procedure:

Practice will be needed for the Pasco machine. Resonance for the Pasco machine should be around 179 to 181.

The rotating mass has masses that can be added which will allow it to rotate out of balance.  Hang the rotating mass by its spring on a very sturdy rod and crossrbar.  Spin the mass and as it slows down in will eventually send the system into resonance as evidenced by a very large oscillation.

References:
  • Yajun Wei, "An Entertaining Resonance Experiment with Just Two Spring Scales", TPT, Vol. 62, #2, Feb. 2024, p. 90.
  • William Dittrich, Leonid Minkin, and Alexander S. Shapovalov, "Mechanical Parametric Oscillations and Waves", TPT, Vol. 51, #3, Mar. 2013, p. 163.
  • Ken Taylor, "Resonance Effects in Magnetically Driven Mass‐Spring Oscillations", TPT, Vol. 49, #1, Jan. 2011, p. 49.
  • Michael C. LoPresto and Paul R. Holody, "Drag Forces, Authors' Response", TPT, Vol. 41, #5, May  2003, p. 262.
  • A. John Mallinckrodt, "Drag Forces", TPT, Vol. 41, #5, May. 2003, p. 261. 
  • Michael C. LoPresto and Paul R. Holody, "Measuring the Damping Constant for Underdamped Harmonic Motion", TPT, Vol. 40, #1, Jan. 2003, p. 22.
  • Chris A. Gaffney and David Kagan, "Beats in an Oscillator Near Resonance", TPT, Vol. 40, #7, Oct. 2002, p. 405.
  • Walter Roy Mellen, "Spring String Swing Thing", TPT, Vol. 32, #2, Feb. 1994, p. 122.
  • Fabrizio Pinto, "Parametric Resonance: An Introductory Experiment", TPT, Vol. 31, #6, Sept. 1993, p. 336.
  • W. Herreman, "The Transient Phenomena of Forced Vibrations", TPT, Vol. 29, #3, Mar. 1991, p. 187.
  • P. Coullet, J. M. Gilli, M. Monticelli, and N. Vandenberghe, "A Damped Pendulum Forced With a Constant Torque", AJP, Vol. 73, #12, Dec. 2005, p. 1122.
  • P. J. Ouseph and John P. Ouseph, "Electromagnetically Driven Resonance Apparatus", AJP, Vol. 55, #12, Dec. 1987, p. 1126.
  • Lee E. Larson, "Interfacing the PASCO Simple Harmonic Motion Apparatus to a Microcomputer", AJP, Vol. 55, #7, July 1987, p. 667.
  • J. L. Hunt, "Forced and Damped Harmonic Oscillator Experiment Using an Accelerometer", AJP, Vol. 53, #3, Mar. 1985, p. 278.
  • Mark A. Heald, "How Do You Know When You've Got Critical Damping?", AJP, Vol. 46, #10, Oct. 1978, p. 989.
  • Robert Ehrlich, "G.5. Mass on a Spring", Turning the World Inside Out and 174 Other Simple Physics Demonstrations, p. 93 - 94.
  • George M. Hopkins, "Harmonic Vibrations", Experimental Science, p. 126 - 129.


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