Who was the creator of principle of inertia

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    Inertia Principle
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Discussion Overview

The discussion centers on the historical development of the principle of inertia, exploring the contributions of Galileo and Newton, as well as the influence of earlier thinkers like Aristotle and Descartes. Participants examine whether these figures arrived at the concept independently and the implications of their ideas on modern physics.

Discussion Character

  • Historical
  • Debate/contested

Main Points Raised

  • One participant suggests that both Galileo and Newton developed the concept of inertia independently, questioning whether Newton was aware of Galileo's work.
  • Another participant asserts that the concept of inertia is something all humans intuitively grasp before learning language, with Galileo and Newton providing quantitative analysis.
  • A different participant challenges the idea of universal understanding by referencing Aristotle's belief that objects slow down, indicating a misunderstanding of inertia.
  • It is noted that Galileo's view of inertia involved bodies in circular motion maintaining constant speed, while Descartes is credited with articulating that a body maintains its velocity unless acted upon by an external force.

Areas of Agreement / Disagreement

Participants express differing views on the origins and understanding of the principle of inertia, with no consensus reached regarding the independence of Galileo and Newton's contributions or the interpretation of earlier ideas.

Contextual Notes

Some claims rely on interpretations of historical texts and definitions of inertia, which may vary among participants. The discussion does not resolve the complexities of these historical contributions.

Aikon
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Hi all,

It is really a history question.
I read that Galileu developed the concept of inertia, but today I knew it from Newton's 1st law. So my question is: Both of them arrived at the idea independently? Was Newton aware about Galileu's work and used the law because it is the basis for his 2nd law F=ma?

Thank you,
 
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Every human, independent of the precise definition of that word in terms of our ancestors, discovers this concept before he/she learns a language.
Galileo and Newton just made them more accessible to a quantitative analysis.
 
mfb said:
Every human, independent of the precise definition of that word in terms of our ancestors, discovers this concept before he/she learns a language.
Galileo and Newton just made them more accessible to a quantitative analysis.

Not quite true. Aristotle thought that things would slow down (he didn't consider the role of friction). Galileo preceded Newton.
 
Aristotle thought that things would slow down (he didn't consider the role of friction).
Conservation of momentum is a different thing. I think you need a concept of inertia to propose a violation of momentum conservation.
 
Galileo's notion of inertia seems to have been that bodies in circular motion keep going at constant speed. Descartes seems to have been the first to state that a body maintains its velocity (i.e. speed and direction) unless acted upon by an external force. It's stated, for example, in his 'Meditations' of 1642 (the year Newton was born).
 

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