Problem on Equilibrium ( STATICS )

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    Equilibrium Statics
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Discussion Overview

The discussion revolves around a statics problem related to equilibrium, specifically focusing on the assumptions necessary for solving the problem involving thrust collars and moments. Participants are exploring the implications of the given moment value and the weight of the structure.

Discussion Character

  • Homework-related
  • Debate/contested
  • Exploratory

Main Points Raised

  • Some participants question the meaning of the moment value of 400 Nm and its application to the axis of moment, suggesting it may refer to the OA axis under the assumption of proper alignment.
  • There is a discussion about whether the moment of 400 Nm is total or per thrust collar, with some participants seeking clarification on the structure's weight and its relevance to the problem.
  • One participant notes that if the structure's weight is negligible, it raises questions about whether this is a specified or additional assumption.
  • Concerns are raised about the number of unknowns in the problem, with one participant identifying nine unknowns and only four equations available, leading to the conclusion that further assumptions may be necessary to make the problem solvable.
  • Another participant expresses confusion regarding the horizontal radius from O-B and suggests that resolving the moment may require understanding the distance of the hanging weight from the ZY plane and the angle of the O-A axis to the horizontal.

Areas of Agreement / Disagreement

Participants generally agree that the problem involves multiple unknowns and assumptions, but there is no consensus on the interpretation of the moment value or the implications of the structure's weight. The discussion remains unresolved with competing views on how to approach the problem.

Contextual Notes

Participants highlight limitations related to the assumptions made about the structure's weight and the number of equations versus unknowns, indicating that these factors complicate the problem-solving process.

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so i was wondering what assumptions needed to make this solvable and ' support at both thrust collars can totally support the moments of 400 Nm before they slip' means which axis of moment
 
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Is this a homework problem?

There is a contradiction, in that the “thrust collars” must withstand a moment.
Thrust would be axial, moment would be about the axis.

Is that a moment of 400 N⋅m each, making 800 N⋅m, or a total of 400 N⋅m together ?

How much does the structure weigh, is that important ?

You need to provide some feedback to the answers you receive.
 
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Yeah It's a homework problem.
I'm not sure what the problem means when it says 400 NM but from my understanding i think it is in OA axis with assumption that the system is properly aligned.
The structure weight is negligible.
 
lakuzamalakuzam said:
The structure weight is negligible.
Is that a specified assumption, or an additional assumption ?
 
lakuzamalakuzam said:
Yeah It's a homework problem.
I'm not sure what the problem means when it says 400 NM but from my understanding i think it is in OA axis with assumption that the system is properly aligned.
The structure weight is negligible.
but then there will be 9 unknowns ( Fx ,F//OA, Fperpendicular to OA, couple in OA axis for each of the thrust collar and W) with 3 scalar equation and 1 vector equation = 4 eq
so i think i will have to make further assumptions like there are no support reaction on the upper thrust collar and now there are 5 unknowns which isn't solvable
 
Last edited:
Baluncore said:
Is that a specified assumption, or an additional assumption ?
additional assumption
 
The horizontal radius from O-B confuses things.
Too many equations, and not enough understanding of the system.

To resolve the moment, should it not be sufficient to resolve the distance of the hanging weight from ZY plane that contains the O-A axis, and the angle of the O-A axis to the horizontal ?
 

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