What Is the Role of Point D in a Body Diagram and Moment Equilibrium?

Click For Summary

Homework Help Overview

The discussion revolves around understanding the role of point D in a body diagram related to moment equilibrium. Participants are exploring the implications of different assumptions about point D's function in the context of a structure that may hinge and roll.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning whether point D represents a roller or a pulley and discussing the implications of assuming a force at that point. There are attempts to clarify the drawing and the conditions of equilibrium.

Discussion Status

The discussion is active, with participants sharing their interpretations of point D and its role. Some guidance has been offered regarding the assumption of forces at D, but there is no explicit consensus on the correct interpretation.

Contextual Notes

There is uncertainty about the nature of point D and whether it should be treated as having a force acting on it. Participants are also considering the structural setup and its implications for solving the problem.

cracktheegg
Messages
48
Reaction score
0

Homework Statement



Untitled_zpseabfa304.png


Homework Equations



M=FA

Equlibrium condition=
net Fy=0
net Fx = 0
Total Moment=0


The Attempt at a Solution


I need help with the body diagrem

The D circle thing is what? is that a roller?
 
Physics news on Phys.org
Yes, I also think so. The structure hinges at A and in order to compensate for its expansion it can roll over the supporting surface at D. The cable is there to raise it.
 
photo1_zps28ed9b30.jpg


Did i draw correctly?
 
It seems so,yes. I am also not sure if there should be a force at D since it seems you would not be able to solve it if there is a force present at that point.
 
I think you should assume there is no force at D. Maybe it is not a bridge and it is a pulley at end D.
 
Basic_Physics said:
I think you should assume there is no force at D. Maybe it is not a bridge and it is a pulley at end D.
That is how I see it also. No support at D.
 

Similar threads

Calculate the course of the Force and Moment
  • · Replies 1 ·
Replies
1
Views
1K
What are the equations for circular motion on a Ferris wheel with R2D2?
  • · Replies 12 ·
Replies
12
Views
2K
Calculating Distance: Free Body Diagram for Box Sliding with Friction
  • · Replies 1 ·
Replies
1
Views
2K
Center of mass and momentum- A question about systems
  • · Replies 25 ·
Replies
25
Views
2K
Equilibrium of Rigid Bodies. Rafter. What is moment arm?
  • · Replies 1 ·
Replies
1
Views
3K
Torque/Moment of a bent wrench question
  • · Replies 4 ·
Replies
4
Views
3K
Statics free body diagram (frames and machines)
  • · Replies 5 ·
Replies
5
Views
4K
Free body diagram drawing for a two force members on machine
  • · Replies 1 ·
Replies
1
Views
5K
How to find the equilibrium position of three masses (two of them fixed)?
  • · Replies 4 ·
Replies
4
Views
2K
Solve Force & Moment Homework: Why Don't Consider P at C?
  • · Replies 1 ·
Replies
1
Views
1K