Solving Problems Involving Tension & Weight

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Homework Help Overview

The discussion revolves around a physics problem involving tension and weight, specifically analyzing the forces acting on a picture hanging from a nail. The original poster presents a scenario where the tension in the strings supporting the picture is given, along with the angle formed by the strings.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to establish a relationship between the tensions and the weight of the picture using equilibrium equations. Some participants question the angle of the strings, while others inquire about the free body diagram to clarify the forces involved.

Discussion Status

The discussion is ongoing, with participants providing guidance on the relationship between the forces and encouraging the use of a free body diagram. There is an acknowledgment of the original poster's approach, but no consensus has been reached on the specifics of the problem.

Contextual Notes

The original poster mentions a potential typo regarding the angle, which could affect the analysis. The problem is framed within the constraints of a homework assignment, implying a need for careful consideration of the forces involved.

chynawok
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I looked in the physics book and couldn't find any similar examples. Maybe someone can tell me how to go about this problem:

A picture it hanging on a nail. The tension in each string segment which is holding up the picture is 3.5 N. The string forms a 45 degree angle on the two top corners of the picture frame.

a) What is the equilibrant or the upward reaction force of the nail?
b) What is the weight of the picture?

This is how I started going about it:
T1 + T2 + W = 0
Tsin45 + Tsin 45 - W = 0
2Tsin45 = W
2(3.5)sin45 = W = 4.9 N

Any pointers?
Thanks
 
Last edited:
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Is it 40° or 45°?
 
oops. typo- it's 45 degrees.
 
What does your free body diagram look like? Since the nail is the only item that is holding the picture up, you are correct with saying that the weight of the picture and the reaction force at the nail are equivilent.
 
Last edited:

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