3A70.45 - Coupled Resonance - Springs

Code Number:
Demo Title:
Coupled Resonance - Springs
Coupled Resonance
Area of Study:
Two set of springs with different sizes and spring constants, 500 and 1000 g masses, crossbar with hooks.

Place the springs on the hooks of the crossbar.  Hang 1000 gram masses from the large springs and 500 gram masses to the smaller springs.  Start one of the masses oscillating and eventually enough energy will transfer to the other identical system.  Only the systems that are identical will show any appreciable resonance.  


H. Ric Blacksten, "Exploring Resonance Phenomena", TPT, Vol. 32, #9, Dec. 1994, p. 554.

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.