Finding Forces Acting on Member ABE: A Conceptual Question

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SUMMARY

The discussion focuses on determining the forces acting on member ABE, specifically addressing the reactions at points C, E, and F. The participant confirms that the reaction at C is an external force acting perpendicular to the slot, which prevents sliding. They also mention that the correct reaction at E has been established, while they are seeking to calculate Reaction Ax, Ex, and Bx. The final answer for Reaction Ax is confirmed to be 2025N directed leftward.

PREREQUISITES
  • Understanding of static equilibrium principles
  • Familiarity with force components and reaction forces
  • Knowledge of moments and their calculations
  • Concept of pin connections and their behavior in structures
NEXT STEPS
  • Study the method of joints in truss analysis
  • Learn about calculating reaction forces in pin-connected structures
  • Explore the concept of moment equilibrium in static systems
  • Review the effects of external forces on structural members
USEFUL FOR

Students in engineering mechanics, structural engineers, and anyone involved in analyzing forces in truss systems will benefit from this discussion.

ME_student
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Homework Statement


Find the components of all forces acting on member ABE.

Homework Equations


Equations I used are on attachment

The Attempt at a Solution


I found moments about E and F. My reaction at E is correct. I just have a conceptual question about the reaction at C.

The reaction is a external force or internal at C and is it at an angle circles on attachment or straight? I want to say an external force at an angle.
 

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ME_student said:

Homework Statement


Find the components of all forces acting on member ABE.

Homework Equations


Equations I used are on attachment

The Attempt at a Solution


I found moments about E and F. My reaction at E is correct. I just have a conceptual question about the reaction at C.

The reaction is a external force or internal at C and is it at an angle circles on attachment or straight? I want to say an external force at an angle.

Since C is a pin in a slot, I think the reaction there must be a force acting perpendicular to the side of the slot. Any force component acting tangentially will just cause the pin to slide up or down along the direction of the slot.
 
Yes, it is perpendicular to the side of the slot. I got it worked out., but now I am stuck on another part of the problem. I need to find Reaction Ax, Ex and Bx. On members ACF will there be a reaction that will occur where the slot is or does that need to go away? I am taking moments about F to try to get Reaction Ax but I don't obtain the right answer. THe answer is 2025N leftward
 

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