Classical Mechanics: Torque, Angular Momentum & Origins

Click For Summary

Discussion Overview

The discussion focuses on the historical and conceptual foundations of torque and angular momentum within classical mechanics. Participants explore how these concepts were defined, their origins, and the contributions of early scientists to their development.

Discussion Character

  • Historical
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • One participant notes that while Aristotle may be the earliest known writer on the subject, the principles of levers likely predate him by thousands of years.
  • Another participant mentions Archimedes as a significant figure in the early understanding of these concepts.
  • A different participant emphasizes the importance of conserved quantities like momentum, energy, and angular momentum in predicting interactions, suggesting that these concepts evolved through the contributions of many scientists.
  • One participant requests resources or links to study the historical development of these concepts.
  • Another participant raises a question about how physical quantities are defined to accurately describe the quantum of a physical interaction.

Areas of Agreement / Disagreement

The discussion contains multiple viewpoints regarding the historical origins of torque and angular momentum, with no consensus on a single narrative. Participants express curiosity about the evolution of these concepts but do not agree on specific definitions or sources.

Contextual Notes

Participants express uncertainty about the definitions of physical quantities and their applicability to quantum interactions, indicating a potential gap in understanding or consensus on these topics.

person_random_normal
Messages
165
Reaction score
10
In classical physics , specifically in rotational mechanics we have concepts of torque , angular momentum and their extensions. We widely use them in problem solving but how were they defined , what was the basis of their definition , was all that purely experimental and most importantly who did that ?
 
Physics news on Phys.org
Aristotle (384-322 B.C) might be the earliest writing but the principles of levers must have been known 1000's of years earlier.

Edit: Archimedes also (287-212 BC)
 
Welcome to PF Shreyas!

Any quantity that is conserved in an interaction will be useful because it allows us to predict what the results of an interaction will be. Since momentum, energy, angular momentum will be conserved interactions, in the absence of external effects such as external force or external torque or external energy sinks, these quantities will be important. When these quantities change due to external effects, the rates of change will be important to keep track of (Force = dp/dt = dE/dx; Torque = dL/dt;) in order to determine the final values.

You should study the history of science/physics to better appreciate how these concepts evolved. These concepts were developed due to the work of many great scientists.

AM
 
where may i find that ? some link ...
 
I actually mean to ask, how is a particular physical quantity defined so that it rightly describes quantum of a physical interaction ?
 

Similar threads

  • · Replies 3 ·
Replies
3
Views
2K
Replies
4
Views
2K
  • · Replies 19 ·
Replies
19
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 6 ·
Replies
6
Views
1K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
Replies
2
Views
2K