Statics (smooth pin reaction + tension)

In summary, the conversation discusses the concept of tension in a cable and how it varies in different segments. The equations for calculating tension are mentioned, and there is a question about whether the tensions A and B should be the same. The conversation ends with a statement about solving for tension and the reaction on the pin.
  • #1
jegues
1,097
3

Homework Statement


See figure.


Homework Equations


[tex] \sum F_{x} = 0 [/tex]
[tex] \sum F_{y} = 0 [/tex]
[tex] \sum M = 0 [/tex]

The Attempt at a Solution


See figure (written in my writing).

Are the tensions A and B suppose to be the same? I imagine not because they are at different angles so they have different magnitudes but at the same time tension should be constant over the smooth pulley.

I'm having trouble solving the tension in ADB.

Any ideas?
 

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  • #2
In a single cable different segments must have the tension.
So
T*sinθ1*x1 + Τ*sinθ2*x2 = F*x3.
Now solve for T.
The reaction on the pin is ΣTx.
 

Related to Statics (smooth pin reaction + tension)

1. What is "statics" in the context of smooth pin reaction and tension?

Statics is a branch of mechanics that deals with the study of stationary objects and systems, as opposed to dynamics which deals with moving objects. In the context of smooth pin reaction and tension, it refers to the analysis of forces acting on a stationary object or structure.

2. How do you calculate the reaction force at a smooth pin?

The reaction force at a smooth pin can be calculated by taking the sum of all external forces acting on the object and setting it equal to zero. This is based on the principle of equilibrium, which states that for an object to be at rest, the sum of all forces acting on it must be zero. The reaction force at the smooth pin will be equal in magnitude but opposite in direction to the force applied at the pin.

3. What is the difference between tension and compression in statics?

In statics, tension refers to a pulling force applied to an object, while compression refers to a pushing force. Both tension and compression are types of internal forces that act within a structure to keep it in equilibrium. The main difference is in the direction of the force, with tension pulling away from the object and compression pushing towards it.

4. How does the angle of a tension force affect static equilibrium?

The angle of a tension force can affect static equilibrium by changing the direction and magnitude of the force components. For example, if a tension force is applied at an angle to an object, it will create both horizontal and vertical force components. These components must be taken into account in order to properly analyze the static equilibrium of the object.

5. Can a tension force ever be greater than the applied load in statics?

Yes, a tension force can be greater than the applied load in statics if there are other external forces acting on the object. This can occur if the object is in a state of tension due to its own weight or if there are other forces acting on it, such as wind or friction. In this case, the tension force will be greater than the applied load in order to keep the object in equilibrium.

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