Does a single elementary particle in motion exhibit inertia?

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Discussion Overview

The discussion revolves around the concept of inertia as it pertains to a single elementary particle in motion, exploring whether such a particle exhibits inertia in isolation. Participants engage in thought experiments and philosophical considerations regarding the nature of inertia, motion, and reference frames.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants argue that an object has inertia regardless of its motion, asserting that inertia is not dependent on speed.
  • Others contend that without a frame of reference, the concept of motion—and thus inertia—cannot be properly defined.
  • A few participants suggest that if an object has mass, it inherently possesses inertia, independent of its state of motion.
  • There are discussions about the implications of defining motion and inertia in a hypothetical universe with only one object.
  • Some participants question the relevance of inertia in a non-physical universe, suggesting that physics may not apply meaningfully in such scenarios.
  • Concerns are raised about the distinction between inertia and momentum, with some participants seeking clarification on how these concepts relate.
  • One participant proposes an analogy involving a rubber band to illustrate the persistence of inertia, even when not actively resisting change.
  • There are challenges regarding the validity of thought experiments that isolate objects from any interaction or external forces.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the nature of inertia in isolation. Multiple competing views remain regarding the definitions and implications of inertia, motion, and reference frames.

Contextual Notes

Limitations include the dependence on definitions of motion and inertia, as well as the unresolved implications of discussing a single object in a hypothetical universe. The discussion reflects various interpretations and assumptions about physical concepts.

  • #31
timetraveldude said:
Consider this thought experiment. If only one object existed in all the universe and it was moving would it have inertia?
If you speak a word "universe" then it means existence of all attributes inherent in it.
This is the space, time, gravitation, light and … at least one black hole in the center of this universe. Without each of this “component” existence of universe and object (mass) itself is impossible. Then, what is your question ?
 
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  • #32
timetraveldude said:
Stick to the topic there is nothing mentioned about dividing. Just answer the question.

He did answer the question. You're just saying that you don't like the answer!
 
  • #33
I think Timetraveldude question is not well set. The only "unique object" possible is an elementar particle. In this case the question has no sense because there could never be inertial effects. To have it, we should demonstrate that it is not adimensional and it can rotate (not the quantistic spin, of course).

All other objects are formed by more than one particle, so there can be inertial effects.

I think I would probably used the following question instead: "Given a universe with just one elementar particle, the total energy of this universe is greater than zero?" and I think the anwer is "no"
 
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  • #34
Dina-Moe Hum said:
I think Timetraveldude question is not well set. The only "unique object" possible is an elementar particle. In this case the question has no sense because there could never be inertial effects. To have it, we should demonstrate that it is not adimensional and it can rotate (not the quantistic spin, of course).

All other objects are formed by more than one particle, so there can be inertial effects.

I think I would probably used the following question instead: "Given a universe with just one elementar particle, the total energy of this universe is greater than zero?" and I think the anwer is "no"
Does this elementary particle you talk about have size?
 

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