Moments - Principle of moments question

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Homework Help Overview

The discussion revolves around a problem related to the principle of moments in physics, specifically focusing on determining an unknown force in a system at equilibrium.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants explore the application of the principle of moments, questioning how to set up the problem correctly and which point to take moments about. There is also speculation about the positioning of forces in the system.

Discussion Status

The discussion is ongoing, with participants offering hints and guidance on how to approach the problem. There is an exploration of different interpretations regarding the placement of forces and the setup of the moments.

Contextual Notes

Participants express uncertainty about the configuration of forces and the application of the principle of moments, indicating a need for clarification on these aspects.

Jambob28
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I am trying to determine force X

I know it is the principle of moments so I think you use this equarion - not sure though:

In equilibrium
(the sum of)anticlockwise moments = (the sum of) clockwise moments

however I am not sure how to do it?

thanks for any help!
 
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Hi Jambob28! Welcome to PF! :wink:

Hint: you need to take moments about a point

the question asks you where the third horizontal force is

which point do you think you should take moments about? :smile:
 
Hi thanks for your help.

I am guessing the other arrow would be at the same level as arrow B but right instead of left?
So
B Y
<-----------|||||----------->

I really am pretty useless so I'm probably wrong.
 
hmm … look at the first diagram …

where is the third place where a force can be exerted? :smile:
 
well I guess you could pull it the other way?

so:
Y <-------------|||-----------> Pull
 

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