Shear, bending, and stress in a beam; Please explain

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SUMMARY

This discussion focuses on understanding shear, bending, and stress in a beam, specifically addressing the variable "x" in relation to distributed loads. The variable "x" represents the distance along the beam from point A, which is crucial for calculating forces in the equation "∑Fy". A distributed load of 3 kips/ft is applied between points A and C, emphasizing the importance of distance in force calculations. Participants express confusion regarding the relationship between distance and force in the context of distributed loads.

PREREQUISITES
  • Understanding of beam mechanics
  • Familiarity with shear and bending moment diagrams
  • Knowledge of distributed loads and their effects
  • Basic grasp of equilibrium equations in statics
NEXT STEPS
  • Study the concept of shear force and bending moment in beams
  • Learn how to construct shear and bending moment diagrams
  • Explore the effects of distributed loads on beam calculations
  • Review equilibrium equations, particularly "∑Fy" and "∑Fx"
USEFUL FOR

Students in engineering or physics courses, civil engineers, and anyone involved in structural analysis or mechanics of materials will benefit from this discussion.

Amr719
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Homework Statement


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Homework Equations

The Attempt at a Solution


Screenshot (32).png
I can't understand the solution and what is the variable "X" !
 
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Amr719 said:
I can't understand the solution and what is the variable "X" !

If you look carefully at the diagrams, the meaning of the variable "x" should be apparent. It's the <blank> along the beam from point A.
 
Yes , but it is considered part of the force in the " ∑Fy " . That's what I cannot understand
 
Amr719 said:
Yes , but it is considered part of the force in the " ∑Fy " . That's what I cannot understand
One of the loads on the beam is the distributed load of 3 kips/ft, applied between points A and C.

Do you understand how a distance might be considered essential in calculating the amount of force created from a distributed load?
 
No
 
Amr719 said:
No
What don't you understand about distributed loads? You know, loads spread out over a certain distance along a beam, say.
 

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