Mechanics of Materials; I regarding this very fundamental problem.

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SUMMARY

The discussion centers on the mechanics of materials, specifically the equilibrium of forces in a structural system. It highlights the misconception that the force P must always equal 60 kips due to the rigidity of members and equilibrium conditions. The participants clarify that the force supplied by the wall is unknown, which affects the overall force distribution and cannot be assumed to be constant. Thus, P may vary depending on the actual forces acting on the structure.

PREREQUISITES
  • Understanding of static equilibrium in structural analysis
  • Knowledge of force distribution in rigid body mechanics
  • Familiarity with kips as a unit of force
  • Basic principles of mechanics of materials
NEXT STEPS
  • Study the principles of static equilibrium in mechanics
  • Learn about force distribution in rigid body systems
  • Explore the concept of reaction forces at supports in structures
  • Investigate the role of external forces in structural analysis
USEFUL FOR

Structural engineers, civil engineering students, and professionals involved in analyzing and designing load-bearing structures will benefit from this discussion.

gikiian
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Why would the force P not always be equal to 60 kips?

(I mean, since the structure is in equilibrium, and the members are rigid, can't we shift the two forces of 30kips each to the line of action of force P and conclude that P is always 60kips?)

Thanks for your time.
 

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You don't know what force is supplied by the wall.

Now read what the problem asked you to find.
 

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