Tension problem with 2 strings, 1 mass

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Homework Help Overview

The problem involves two strings supporting a 20-pound weight, with one string pulling at a 30-degree angle. The original poster expresses difficulty in determining the tension in the strings, specifically noting an expected answer of 10.3 pounds. A free body diagram is also required for the problem.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the static nature of the weight and the implications for the forces acting on it. Questions are raised about the use of equilibrium equations and the relevance of the forces in the x and y directions.

Discussion Status

The discussion is ongoing, with participants exploring the implications of static equilibrium and questioning the application of relevant equations. Some guidance has been offered regarding the need for a free body diagram and the consideration of forces in both directions.

Contextual Notes

Participants note that the problem lacks specific variables or degrees for the second string, which may affect the analysis. The requirement for a free body diagram is also highlighted as a necessary component of the solution.

jay1194
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Homework Statement


So In this problem, I have two strings, one string pulls with pounds and is 30 degrees away from an imaginary line straight down of of the two strings and there are no variables or degrees given for the second string. The weight is 20 pounds. I have been looking at this equation for hours and nothing is coming to mind. The answer is 10.3 pounds, but i don't know what to do to get there. Also have to have a free body diagram.

here is a picture of problem 2.2. The numbers is parenthesis are the answers to the problem. If i could find the answer for a, then i could easily do b.
 

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jay1194 said:

Homework Statement


So In this problem, I have two strings, one string pulls with pounds and is 30 degrees away from an imaginary line straight down of of the two strings and there are no variables or degrees given for the second string. The weight is 20 pounds. I have been looking at this equation for hours and nothing is coming to mind. The answer is 10.3 pounds, but i don't know what to do to get there. Also have to have a free body diagram.

here is a picture of problem 2.2. The numbers is parenthesis are the answers to the problem. If i could find the answer for a, then i could easily do b.
Well, is the weight moving at all when it is suspended by the wires? If it isn't, what does that tell you about the forces acting on the weight?
 
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No, it isn't moving at all. The forces are keeping the weight static. That is all I know. I've been staring at this problem for hours and still can't do a thing
The basic equation he told us to use is:
∑Fx = max
 
jay1194 said:
No, it isn't moving at all. The forces are keeping the weight static. That is all I know. I've been staring at this problem for hours and still can't do a thing
The basic equation he told us to use is:
∑Fx = max
Since the weight is not moving, it is in equilibrium, so that particular equation will be of little use in solving this problem.

If you were to draw a free body diagram, could you write the equations of static equilibrium for this weight?
 
jay1194 said:
No, it isn't moving at all. The forces are keeping the weight static. That is all I know. I've been staring at this problem for hours and still can't do a thing
The basic equation he told us to use is:
∑Fx = max
If nothing starts to move, what is the value of ax? There's also the y direction.
 

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