- #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
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SUMMARY
The discussion centers on determining the forces acting on structural members S1 and S2, specifically in the context of tension and compression. Both members are confirmed to be under tension due to the resultant force from F1 and F2, which is approximately 6250 N at an angle of 40° from the horizontal. The participants emphasize the importance of resolving forces normally to each reaction force to simplify calculations, rather than solving simultaneous equations. Additionally, the accuracy of the angles in the diagram is highlighted as a critical factor in assessing the forces.
PREREQUISITES- Understanding of structural mechanics principles
- Familiarity with tension and compression forces
- Knowledge of graphical vector addition techniques
- Ability to interpret force diagrams accurately
- Study methods for resolving forces in structural analysis
- Learn about graphical vector addition in engineering contexts
- Explore the implications of angle accuracy in force diagrams
- Research techniques for simplifying simultaneous equations in mechanics
Structural engineers, civil engineering students, and professionals involved in analyzing forces in construction and mechanical systems will benefit from this discussion.
- #2
Lnewqban
Homework Helper
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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
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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
- 42,808
- 10,496
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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