Finding unknown mass with tension

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SUMMARY

The discussion focuses on determining the mass of an object using tension in strings, specifically in a scenario involving two strings supporting a key. The equations T2 = mg and Ty = T1sinθ are central to the analysis. The user struggles with calculating the tension and the x-components of the forces involved. The solution requires a comprehensive understanding of both vertical and horizontal components of tension in a static equilibrium system.

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  • Knowledge of tension forces in physics
  • Familiarity with trigonometric functions, particularly sine
  • Ability to analyze free-body diagrams
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Homework Statement



so my teacher assigned me a to find the mass of this key without a scale using strings at whatnot.


Homework Equations





The Attempt at a Solution


i tried setting up the system like this:

____ceiling_____
\ /
\/
O
|
[Key]

and i can't seem to find it because i can't find tension.

T2=mg and Ty=T1sinθ

2T1y=T2
 
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What about the x components of the tensions? You need to find both the x and components for both strings. I'm assuming there is two strings there.
 

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