How Does Newton's Law of Gravitation Influence Modern Physics?

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Homework Help Overview

The discussion revolves around the interpretation and implications of Newton's Law of Gravitation, particularly focusing on the concept of "g" and its significance in modern physics.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the definition of "g" and its standard meaning, questioning its interpretation in the context of gravitational force. There are attempts to clarify the relationship between gravitational force and acceleration, as well as discussions on the formalism involved in applying Newton's law.

Discussion Status

The discussion is ongoing, with participants seeking to clarify the original question regarding Newton's law of gravity. Some guidance has been offered regarding the definitions and relationships involved, but there is no explicit consensus on the main inquiry.

Contextual Notes

There appears to be some confusion regarding the definitions and interpretations of terms related to gravitational concepts, which may be impacting the clarity of the discussion.

Dirac
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Dirac.
 
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Well, what is the definition of "g"?
 
It is true that "g" has units of force per mass, but that is not what I asked you about.

What is the standard meaning of "g"?
Hint: It has a name all by itself..
 
No, it is called the "acceleration due to gravity".
Have you heard that expression before?
 
You never said what "g" was, only A!
In your problem, it should be interpreted as the acceleration at the Earth's surface.

So, letting M be the Earth's mass, we have that g=M/R^2
Is that enough of a hint?
 
I forgot it..
It should be g=GM/R^2
 
I think the ingredient's you need are f=GmM/r/r Newtons law of gravity and f=ma then you prove the rest simply by definition of small g=a at r=R. You do a few substitutions and you are there. You are probably having problems with the formalism of the process?
 
This has gone on for 6 responses now and I still wonder: What are you asking about Newton's law of gravity?
 

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