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Finding unknown mass with tension

  1. Nov 6, 2007 #1
    1. The problem statement, all variables and given/known data

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


    2. Relevant equations



    3. The attempt at a solution
    i tried setting up the system like this:

    ____ceiling_____
    \ /
    \/
    O
    |
    [Key]

    and i cant seem to find it because i cant find tension.

    T2=mg and Ty=T1sinθ

    2T1y=T2
     
  2. jcsd
  3. Nov 6, 2007 #2

    hage567

    User Avatar
    Homework Helper

    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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