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Homework Help: Circular Motion

  1. Oct 13, 2009 #1
    1. The problem statement, all variables and given/known data

    A shaft is set up in the vertical direction. Two strings are attached to a mass m, the shaft is rotates so that the tangential velocity of m is 3.10 m/s

    a) Find tension of string 1 & 2

    2. Relevant equations



    3. The attempt at a solution

    First I found the acceleration

    a = v2/r = 3.12/1.25 = 2.48 m/s2

    Fa = ma = 1.75*2.48 = 4.34 N

    I then took it into components

    [tex]\sum[/tex]Fx = Fa - T1sin[tex]\theta[/tex] - T2sin[tex]\theta[/tex] = 0 = 4.34 - T1sin[tex]30[/tex] - T2sin[tex]30[/tex]


    [tex]\sum[/tex]Fy = T1cos30 - mgT2cos30 = 0

    are these correct i would just solve for the Ts here on after
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Oct 14, 2009 #2
    i thin Fy = T1 - T2 - mgcos30 = 0
     
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