Negative Tension: Myth or Reality?

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    Negative Tension
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Discussion Overview

The discussion centers around the concept of negative tension, exploring whether it exists in physical systems, particularly in relation to springs and other materials under stress. Participants consider the implications of tension and compression in various contexts, including theoretical and practical applications.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant questions the existence of negative tension, suggesting that during the expansion of a spring, there may be a state that could be characterized as negative tension, but only until the spring reaches its equilibrium length.
  • Another participant proposes that compression might be viewed as "negative tension," particularly in springs or stiff objects, but asserts that ropes or strings cannot exhibit negative tension as they would go slack and exert no force.
  • A later reply reiterates the idea that compression could be considered a form of negative tension due to atoms being out of equilibrium, questioning whether this aligns with the definition of tension.
  • One participant raises the notion that tension might be treated as an absolute value, suggesting that any stress deviating from zero could be considered tension, regardless of its sign.

Areas of Agreement / Disagreement

Participants express differing views on the concept of negative tension, with some proposing that it could be associated with compression, while others argue that it cannot exist in certain materials like ropes. The discussion remains unresolved with multiple competing perspectives.

Contextual Notes

Participants have not reached a consensus on the definition of tension or its relationship to compression, and there are unresolved questions regarding the conditions under which negative tension might be applicable.

Himal kharel
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Is there anything such as negative tension?
 
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The first thing that came to mind is a spring. Let's say you have a condensed spring. There is tension; it will expand if allowed. I was thinking that maybe during expansion there would be something that could be called negative tension. However, as soon as the spring reaches its natural equilibrium length, and proceeds to expand beyond that due to momentum, there will be something I think could be characterized as tension pulling the spring back to its equilibrium length.

I hope I don't get an infraction for conjecture, but I thought this might help.

Jake
 
I guess compression could be thought of as "negative tension", and could be exhibited by springs or relatively stiff objects. But there would never be negative tension in a rope or string, since it would simply go slack and exert zero force.
 
Redbelly98 said:
I guess compression could be thought of as "negative tension", and could be exhibited by springs or relatively stiff objects. But there would never be negative tension in a rope or string, since it would simply go slack and exert zero force.

Isn't compression a form of tension since there are atoms out of equilibrium - or is that not part of the definition of tension?

Jake
 
Wouldn't tension be an absolute value? i.e. any stress deviating from zero, regardless of sign?
 

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