Finding Tensions (3 strings and 1 mass)

In summary, the conversation revolves around determining the tensions in strings 1, 2, and 3 in a given picture. The poster is seeking guidance on solving for the tensions and is reminded to give names to the tensions and write out equations for the x and y components.
  • #1
Prima
1
0

Homework Statement



In the picture, what are the tensions in strings 1, 2, and 3?

http://www.flickr.com/photos/90172232@N04/8194075362/

Homework Equations





The Attempt at a Solution



I know string 3 is obviously 200N. I forget how to solve for the other strings. Do I add vectors here? string 1 = ?*sin(70) perhaps. Can somebody just point me in the right direction with this?
 
Physics news on Phys.org
  • #2
At the junction, you have some forces acting. There is no acceleration. Draw a free-body diagram for the junction and write out equations representing the lack of acceleration.
 
  • #3
Welcome to PF!

Hi Prima! Welcome to PF! :smile:

Start by giving things names

call the tensions T1 and T2.​

Then write the equations for components in the x and y directions. :wink:

(alternatively, draw a vector triangle)
 

FAQ: Finding Tensions (3 strings and 1 mass)

How does the number of strings affect the tension in a system?

The number of strings in a system does not directly affect the tension. Instead, the tension is determined by the force applied to the system and the properties of the strings, such as their length and elasticity.

How does the mass of the object affect the tension in a system?

The mass of the object does not directly affect the tension. However, the weight of the object does contribute to the overall force applied to the system, which can affect the tension in the strings.

What is the relationship between the tension and the length of the strings?

The tension in a string is directly proportional to its length. This means that as the length of the string increases, so does the tension, and vice versa.

How does the elasticity of the strings affect the tension in a system?

The more elastic a string is, the greater its ability to stretch and absorb force. This means that a string with high elasticity will experience less tension compared to a less elastic string when the same force is applied.

Can the tension in a system ever be greater than the applied force?

No, the tension in a system can never be greater than the applied force. This is because the string can only stretch or compress to a certain extent before reaching its breaking point. Once the applied force exceeds the tension limit of the string, it will break and the tension will be released.

Similar threads

Replies
18
Views
2K
Replies
12
Views
554
Replies
4
Views
3K
Replies
3
Views
1K
Replies
10
Views
4K
Replies
29
Views
4K
Replies
9
Views
2K
Replies
33
Views
2K
Back
Top