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Who was the creator of principle of inertia

by Aikon
Tags: galileu, newton first law
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Aikon
#1
Feb14-13, 12:36 PM
P: 21
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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mfb
#2
Feb14-13, 03:34 PM
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P: 11,576
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.
mathman
#3
Feb14-13, 03:38 PM
Sci Advisor
P: 6,031
Quote Quote by mfb View Post
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.

mfb
#4
Feb14-13, 03:44 PM
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P: 11,576
Who was the creator of principle of inertia

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.
Philip Wood
#5
Feb14-13, 04:56 PM
PF Gold
P: 936
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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