Why does a moment have more than one part?

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Homework Help Overview

The discussion revolves around the concept of moments in mechanics, specifically addressing why a moment can be represented in multiple parts from a single force. Participants are exploring the relationship between force components and their contributions to the net moment.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the nature of moments and whether they can be viewed as components that together form the net moment. There is a focus on understanding if each force inherently has two moments acting in opposite directions.

Discussion Status

Some participants are seeking clarification on the definition of the parts of a moment and whether their interpretation aligns with the concept of components contributing to the net moment. Guidance has been offered regarding the decomposition of forces into vectors and the summation of their moments.

Contextual Notes

There is an emphasis on ensuring that the understanding of moments as components is correct, with references to specific calculations and examples provided in the original homework context.

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Homework Statement



Question 1-4 from here http://www.eng.auburn.edu/~htippur/mech3130/hw-1-solutions-2012.pdf

My question is why exactly does the moment have 2 parts from 1 force? Are those simply the components which together make up the net moment? Does each force always have 2 moments in opposite directions?

Homework Equations



The Attempt at a Solution



I think that the sum of the two moments makes the net moment.
 
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1question said:

Homework Statement



Question 1-4 from here http://www.eng.auburn.edu/~htippur/mech3130/hw-1-solutions-2012.pdf

My question is why exactly does the moment have 2 parts from 1 force? Are those simply the components which together make up the net moment? Does each force always have 2 moments in opposite directions?

Homework Equations






The Attempt at a Solution



I think that the sum of the two moments makes the net moment.

It's not clear what you mean when you say a moment has 2 parts. Could you specifically point out these parts?
 
SteamKing said:
It's not clear what you mean when you say a moment has 2 parts. Could you specifically point out these parts?

I guess I mean the components of the moment, aka -80sin45(0.1+0.3sin30) AND 80cos45(0.3cos30).

I just want to make sure that thinking of them as components of the moment, and that their sum is the net moment, is correct.
Thanks
 
The 80 N force is decomposed into two vectors and moments of both vectors are added, it makes calculations easier.
 
szynkasz said:
The 80 N force is decomposed into two vectors and moments of both vectors are added, it makes calculations easier.

That is more or less what I figured, but I wanted to make sure. Thank you.
 

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