- #1
goodOrBad
- 25
- 2
- Homework Statement
- I am given F1=2500N and F2=4000N
- Relevant Equations
- Fx=0
Fy=0
Need to find forces in S1 and S2
- Thread starter goodOrBad
- Start date
Click For Summary
Homework Help Overview
The discussion revolves around determining the forces in structural members labeled S1 and S2, with a focus on understanding the nature of the forces acting on these members, specifically whether they are in tension or compression.
Discussion Character
- Exploratory, Assumption checking, Problem interpretation
Approaches and Questions Raised
- Participants discuss the need for clarity on the symbols used and the nature of the forces. There is mention of using graphical vectorial addition to obtain results, and some participants question the accuracy of the angles in the diagram.
Discussion Status
Some participants confirm the findings of others while suggesting that resolving forces normally to each reaction may simplify the problem. There is an acknowledgment of the challenges posed by the diagram's scale and angles.
Contextual Notes
Participants note that the angles in the diagram may not be to scale, which has implications for the interpretation of the forces in the structural members. There is also a mention of the resultant force's magnitude and direction, which is relevant to the problem at hand.
- #2
Lnewqban
Homework Helper
Gold Member
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What is the question?
Is that symbol an S?
Do you need to tell either compression or tension are acting on members 1 and 2?
Is that symbol an S?
Do you need to tell either compression or tension are acting on members 1 and 2?
- #3
goodOrBad
- 25
- 2
To find forces in member 1 and 2 that is all, yes I just choose S as a symbol
- #4
Lnewqban
Homework Helper
Gold Member
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I have obtained similar results via graphical vectorial addition.
The angles in your diagram are not at scale, which gave me the initial impression that member 2 would be working in compression mode.
However, both structural members are working under tension to resist the action of resultant force from F1 and F2 combination (approximately 6250 N at 40° from horizontal).
The angles in your diagram are not at scale, which gave me the initial impression that member 2 would be working in compression mode.
However, both structural members are working under tension to resist the action of resultant force from F1 and F2 combination (approximately 6250 N at 40° from horizontal).
- #5
- 42,843
- 10,509
I confirm your answers, but it is easier if you resolve normally to each reaction force in turn. That gives you one equation to solve for each separately instead of having to solve simultaneous equations.
- #6
goodOrBad
- 25
- 2
Yeah and when I see it now I see it would have been easier to just use the angles close to the x-axis
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