Why Is Joint IH Classified as Tension?

In summary, the question at hand is to determine whether each joint is in tension or compression. Joint IH and Joint IA should both be in compression, as they are opposing the horizontal and vertical forces exerted by the pin at Joint I. However, Joint AB and Joint AH are both in tension to oppose the force exerted by the roller joint at Joint A. Building the structure with drinking straws and blue-tack can help visualize this.
  • #1
NoobeAtPhysics
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Homework Statement



Determine whether each joint is in tension or compression

(correct answers on the image)

2450jnt.png


Homework Equations



sum of force = 0

The Attempt at a Solution



On Joint I, I don't understand why IH is in tension. The pin is exerting a horizontal force and therefore IH should be in compression to oppose the Joint force. This should be the same for Joint IA right since the pin is also exertng a vertical force?

If we look at Joint A, this logic (sorta) makes sense. The roller joint is exerting only a horizontal force and therefore Joint AB must be in compression to oppose this force.. but then there's joint AH which should be in tension to oppose Joint AB...

Any help would be soo great
 
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  • #2
Build the stricture with drinking straws and blue-tack as see what happens.
As it sits, the whole structure wants to pivot about point A right? (Well, if we hold A.)
So that means that IH is being pulled away from I.
 
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  • #3
NoobeAtPhysics said:
The pin is exerting a horizontal force
Sure, but which way?
 
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Related to Why Is Joint IH Classified as Tension?

1. Why is tension important in a joint?

Tension is important in a joint because it is the force that holds the joint together and allows it to bear weight and resist movement. Without tension, the joint would be weak and unstable, making it difficult to perform daily tasks and activities.

2. How does tension affect the strength of a joint?

Tension plays a crucial role in the strength of a joint. When a joint is in tension, the muscles and tendons surrounding it pull on the bones, creating a stable and strong connection. This tension also helps distribute weight and forces evenly throughout the joint, preventing any one part from becoming overloaded and potentially causing injury.

3. What happens when a joint is under too much tension?

When a joint is under excessive tension, it can lead to strain or injury. This can occur when the joint is forced to bear more weight or movement than it can handle, causing the muscles and ligaments to become overworked and strained. Over time, this can lead to pain, inflammation, and even long-term damage to the joint.

4. Can tension be beneficial for a joint?

Yes, tension can be beneficial for a joint when it is within a healthy range. Controlled tension can help strengthen the muscles and ligaments surrounding the joint, providing better support and stability. It can also improve joint mobility and range of motion, making daily movements easier and more efficient.

5. How can one manage tension in a joint?

There are several ways to manage tension in a joint, including regular stretching and strengthening exercises, maintaining a healthy weight, and using proper form and techniques during physical activities. It is also important to listen to your body and avoid overexertion, as well as seeking medical treatment if you experience chronic joint pain or discomfort.

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