What are the reactions at the support? (momentum)

In summary, the reactions at the support in structural analysis refer to the forces and moments exerted on a structure at its points of support. These reactions are influenced by factors such as external forces, structure geometry and stiffness, and type of support. They can be calculated using statics and equilibrium equations. The reactions at the support are important for determining internal forces and stresses, as well as for designing safe and stable structures. They affect the design by determining the size and location of members, type and arrangement of supports, and material selection.
  • #1
Curious314
31
0
I am taking this course online, and in one of the slides there is this example, but i can't figure out the signs in the momentum formula.
THANKS!

so here is the exersice:
 

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  • #2
It's not immediately clear to me just from the diagram what the direction of the couple (torque) is supposed to be at the end of the object, but given that they put a negative sign on the 2ft, 200lb moment (not momentum), I infer that the torque is in the opposite direction than that.
 

Related to What are the reactions at the support? (momentum)

1. What is meant by "reactions at the support"?

The reactions at the support refer to the forces and moments that are exerted on a structure at the points where it is supported. These reactions are essential for maintaining the equilibrium and stability of the structure.

2. What factors affect the reactions at the support?

The reactions at the support are influenced by several factors, including the magnitude and direction of external forces applied to the structure, the geometry and stiffness of the structure, and the type of support used.

3. How are the reactions at the support calculated?

The reactions at the support can be calculated using the principles of statics and the equations of equilibrium. This involves considering all the external and internal forces acting on the structure and setting them equal to zero to determine the unknown reactions at the support.

4. Why are the reactions at the support important in structural analysis?

The reactions at the support are crucial for determining the internal forces and stresses within a structure. They also play a vital role in the design and optimization of structures, as they help ensure the safety and stability of the structure.

5. How do the reactions at the support affect the design of a structure?

The reactions at the support influence the design of a structure by determining the size and location of structural members, as well as the type and arrangement of supports. They also help in selecting appropriate materials and ensuring the structural integrity of the design.

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