Bullwhip wave mechanics: What changes?

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Discussion Overview

The discussion centers around the properties of wave mechanics as they pertain to the propagation of a bullwhip wave, specifically questioning whether wavelength or amplitude changes as the wave moves toward the tip. The conversation draws parallels to sound waves in varying media and explores differing perspectives on the mechanics involved.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions whether the wavelength or amplitude changes as a bullwhip wave propagates, suggesting an analogy to sound waves in a medium with linearly decreasing density.
  • Another participant provides a link to a resource that discusses wave reflection, which they believe may aid in understanding the topic.
  • A participant notes that the discussion is contentious, highlighting a divide between those who support the idea of supersonic whip cracking and those who do not, mentioning that even experienced whip crackers have differing opinions.
  • A later reply expresses gratitude for the provided link, indicating that it supports the idea that amplitude changes and offers additional insights into wave mechanics.
  • One participant reflects on their interest in the mechanics of transverse waves in variable media, acknowledging that the end behavior of the wave may be crucial to understanding the overall problem.

Areas of Agreement / Disagreement

Participants express differing views on whether amplitude or wavelength changes as the bullwhip wave propagates, indicating that multiple competing perspectives exist within the discussion. There is no consensus reached regarding the mechanics of the wave.

Contextual Notes

The discussion involves assumptions about wave behavior in different media and the implications of wave mechanics, particularly in relation to the end behavior of the wave. Some participants express interest in cosmological implications, which may not be fully explored in the current context.

Greylorn
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What wave property changes as a bullwhip wave propagates toward the tip? Wavelength or amplitude?

The problem seemed at first analogous to that of describing the behavior of a sound wave propagating through air of linearly decreasing density, except that sound is longitudinal.
 
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This might help you think about it :)

http://paws.kettering.edu/~drussell/Demos/reflect/reflect.html
 
This is one of those controversial issues that seesaws between rival camps: in this case the supersonic versus the non-supersonic factions. Even skilled whip crackers disagree. The best explanation I've found so far is here: http://home.comcast.net/~a-mcnibble/Rants/WhyWhipsCrack.pdf according to which it's the concentration of kinetic energy into a smaller and smaller whip segment that does it.
 
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univox360 said:
This might help you think about it :)

http://paws.kettering.edu/~drussell/Demos/reflect/reflect.html

Thank you! The link answered the question in favor of amplitude, and is a fine exposition of other aspects of wave mechanics, providing even more to think about. Greatly appreciated.
 
Bill_K said:
This is one of those controversial issues that seesaws between rival camps: in this case the supersonic versus the non-supersonic factions. Even skilled whip crackers disagree. The best explanation I've found so far is here: http://home.comcast.net/~a-mcnibble/Rants/WhyWhipsCrack.pdf according to which it's the concentration of kinetic energy into a smaller and smaller whip segment that does it.

Bill,
Great link! Although I was more interested in the mechanics of a transverse wave in a variable medium (looking for cosmological implications) than in what happens at the end of a wave's transmission, I was being short sighted. The end may be the most important part of the problem. Thank you for the insight!
 
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