How do I compute the moment in my statics assignment?

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Discussion Overview

The discussion revolves around a statics assignment involving the computation of moments and reaction forces in a structural system. Participants are exploring the conditions under which certain members may be considered zero-force members and discussing the implications of the system's configuration.

Discussion Character

  • Homework-related
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant expresses urgency in needing help with computing moments and reaction forces in a statically determinate system.
  • Another participant requests clarification on the problem statement, specifically the location of loads or couples applied to the system.
  • It is noted that a moment is applied at the bottom right corner of the triangle, which is assumed to be weightless and solid, with a hole in the center not affecting force resultants.
  • There is a mention of a number "6" near the top of the triangle, with confusion about its units, which is clarified to indicate a 6" rod.
  • Some participants propose that the left-hand side member could be a zero-force member, with one participant seeking justification for this assumption.
  • Another participant affirms their belief in the zero-force member status, referencing insights from previous discussions.

Areas of Agreement / Disagreement

Participants express differing views on the status of the left-hand side member as a zero-force member, with some supporting the idea while others seek further justification. The discussion remains unresolved regarding the implications of the moment and the overall configuration of the system.

Contextual Notes

Participants have not provided complete information about the problem statement, including the full configuration and all applied loads, which may affect the analysis. There are also unresolved questions regarding the significance of the hole in the center of the triangle and the interpretation of the dimensions provided.

darrulls
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Statics assignment a bit urgent

So here is my assignment. i wish that someone could help me.

now i know that this system is statically determinate and that i can compute the forces. my problem is that i cannot figure out how i can compute the moment. the Aim of the assignment is to find all the reactional forces in the members.

i was also thinking that the left hand side member could be a zero force member. i don't know whether i am right or wrong
 

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Your image is only partial. Where is the load or couple applied? I see something about 10kN-m, that's about it...please indicate the whole problem statement. Is that a triangular solid yoke plate with a hole in the center?
 


yes there is only a moment applied on the bottom right hand corner. and the triangle i think is assumed to weightless and solid. i don't think the hole in the centre would affect the force resultants.
 


darrulls said:
yes there is only a moment applied on the bottom right hand corner. and the triangle i think is assumed to weightless and solid. i don't think the hole in the centre would affect the force resultants.
Oh, I didn't see that couple down there, my eyes are not that good ; it appears the plate is sliding at its left along a frictionless rod I guess, but I do have another question with strained eyes, I see a number 6 near the top of the triangle, at the cord...no units can I see...6 what??
 
darrulls said:
i was also thinking the left-hand side member could be a zero-force member.

Very good, darrulls! Now draw your free-body diagram, and show the reaction forces acting on it. You must list relevant equations, and show your work; then someone might check your math. The 6 means 6". You know the 6 indicates a 6" rod, not a cord, because, if it were a cord, the problem would be dynamics, not statics.
 


Hi do you really think that the left hand side member is a zero force member. if that is so why?
 
Yes, I currently do. I think you know why. I saw your insightful answer in another thread.
 

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