The Slinky Drop Experiment Analysed

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Discussion Overview

The discussion revolves around the slinky drop experiment, exploring its mechanics through high-school physics concepts such as mechanical equilibrium and conservation of momentum. Participants analyze the evolution of the slinky's shape during the drop and propose various approaches to understanding the underlying physics.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant describes the slinky drop experiment and its basic setup, emphasizing the use of high-school physics to analyze the results.
  • Another participant mentions a suggestion regarding the use of a displacement field in the analysis, indicating a potential alternative approach.
  • A participant asserts that the slinky fraction is the independent material variable, while the displacement field remains dependent, referencing their earlier contributions to the discussion.
  • There is mention of a non-zero rest length of the slinky as an important factor in the analysis, which some participants agree upon.
  • One participant expresses appreciation for the clarification provided by another, indicating a collaborative aspect to the discussion.

Areas of Agreement / Disagreement

Participants appear to have differing views on the variables involved in the analysis of the slinky drop experiment, particularly regarding the roles of the displacement field and the slinky fraction. The discussion remains unresolved with multiple competing perspectives presented.

Contextual Notes

Some assumptions regarding the definitions of variables and the implications of a non-zero rest length of the slinky are not fully explored, leaving certain aspects of the analysis open to interpretation.

Orodruin
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2006-02-04_Metal_spiral.jpg
Figure 1: A slinky, the subject of the slinky drop experiment. Attribution: Roger McLassus. CC BY-SA
The slinky drop is a rather simple experiment. In its most basic form, it requires only a popular toy for children, a stable hand, and a keen eye. For a better view, using a modern smartphone to capture a video of the experiment also helps to capture the falling slinky. Apart from the commonly quoted result, Insight will discuss the evolution of the slinky shape during the drop using only high-school physics: mechanical equilibrium and the conservation of momentum.

What is The Slinky Drop Experiment?
The slinky drop experiment is exactly what it sounds like:

Support a slinky at one of its ends. Let the rest of it hang freely under...

Continue reading...
 

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Oh you beat me to it! It seems that you finally used my suggestion of using the displacement field! I have a similar solution that I might share later.
 
pines-demon said:
Oh you beat me to it! It seems that you finally used my suggestion of using the displacement field! I have a similar solution that I might share later.
No, the displacement field is still the dependent variable. The slinky fraction ##s## is the independent material variable. This is the way I did it from the beginning.

The only addition is a non-zero rest length of the slinky. Otherwise the analysis is the same as my post #5 of that thread, just a bit more polished.
 
Orodruin said:
The only addition is a non-zero rest length of the slinky.
I was talking about that.
Orodruin said:
Otherwise the analysis is the same as my post #5 of that thread, just a bit more polished.
Thanks for the clarification. Anyway, great article!
 
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