The Physics Behind Tablecloth Trickery: Newton & Inertia

  • Context: High School 
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    Inertia Newton Physics
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Discussion Overview

The discussion revolves around the physics involved in the tablecloth trick, specifically focusing on Newton's laws and the concept of inertia. Participants explore the conditions necessary for the trick to succeed, including friction and the dynamics of motion.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions the mechanics of the tablecloth trick, suggesting that Newton's laws and inertia are relevant to understanding the phenomenon.
  • Another participant asserts that Newton's first law and inertia are essentially the same concept, highlighting the importance of these principles in the trick.
  • A different participant emphasizes the role of the coefficient of friction, noting that it is crucial for the success of the trick and that it does not significantly depend on speed.
  • One participant shares a personal anecdote about witnessing the trick performed in a classroom, indicating a retrospective understanding of the physics involved.

Areas of Agreement / Disagreement

Participants generally agree on the relevance of Newton's laws and inertia to the tablecloth trick, but there are nuances regarding the role of friction and the conditions necessary for the trick's success. The discussion does not reach a consensus on all aspects.

Contextual Notes

Some participants mention specific conditions such as the coefficient of friction and the speed of the pull, but these factors are not fully resolved or quantified in the discussion.

AfRoMaNn
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What exactly happens when a tablecloth is pulled out from underneath a table setting, and everything on the table stays put? Newtons laws certainly applies to it but maybe inertia as well?
 
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Newton's first law and inertia are practically the same. Perhaps worded differently sometimes, but it all refers to the same "phenomena".

You also need a low coefficient of friction between glassware and table cloth, high speed, and preferably low centers of mass for each piece.
 
Yes. And the coefficient of friction (The force of friction) does not depend on speed (it is an empirical equation, so it may depend a little), so faster you pull the tablecloth, less time force acts on the glasses and stuff.
 
Yes, my previous physics teacher performed this as a demonstration in class once, and looking back at it now it makes much more sense
 

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