What is the Angular Equivalent of E=mc^2?

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Discussion Overview

The discussion explores the concept of finding an angular equivalent to the famous equation E=mc², examining how linear quantities relate to their angular counterparts. Participants consider various aspects of energy in both linear and rotational contexts, including kinetic energy and other physical quantities.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • Some participants propose that linear quantities have angular counterparts, such as mass to moment of inertia and velocity to angular velocity.
  • One participant suggests that the linear kinetic energy equation can be transformed into its rotational form, stating ##\frac{1}{2}mv^2 \rightarrow \frac{1}{2} I \omega^2##.
  • Another participant expresses a desire for a more daring analogy beyond established relationships between linear and angular motion.
  • One participant questions the premise, arguing that mc² is not directly related to linear or angular motion, thus complicating the search for an angular counterpart.
  • Another participant asserts that energy is a general concept applicable to both linear and angular motion, suggesting a broader interpretation.

Areas of Agreement / Disagreement

The discussion contains multiple competing views, with no consensus on the existence or nature of an angular equivalent to E=mc².

Contextual Notes

Participants express varying interpretations of energy and its relation to motion, indicating potential limitations in definitions and assumptions regarding the analogy sought.

neuralnova
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Many linear quantities have angular counterparts.

Mass --> Moment of inertia
velocity --> angular velocity
acceleration --> angular acceleration
force --> torque
momentum --> angular momentum

E = mc^2 --> ? = I ?^2

Even a loose analogy would do.
 
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Linear kinetic energy -> rotational kinetic energy
 
Or mathematically, ##\frac{1}{2}mv^2 \rightarrow \frac{1}{2} I \omega^2##.
 
Sure -- I should have included those in my list, as I did already know about them. I'm looking for something more daring. ;)
 
neuralnova said:
I'm looking for something more daring.
mc^2 is not related to linear or angular motion, so I'm not sure in what sense there can be an "angular counterpart".
 
Energy isn't linear by default, it's a more general concept that can be applied to both linear and angular motion.
 

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