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Find the tension T of the two blocks. I think I'm doing something wrong

  1. Dec 11, 2012 #1
    Find the tension T of the two blocks. I think I'm doing something wrong :(

    ScreenShot2012-12-11at94641AM.png

    T1 = m1g = (2)(9.81) = 19.62
    T2final = T2 + T1 = m2g + m2g = (3)(9.81) + (2)(9.81) = 29.43 + 19.62 = 49.05

    I did something wrong. :(
    Help?
     
  2. jcsd
  3. Dec 11, 2012 #2
    Re: Find the tension T of the two blocks. I think I'm doing something wrong :(

    Oh wait!!
    T1 = (m1 + m2)g
    T1 = (2 + 3)(9.81)
    T1 = (5)(9.81)
    T1 = (5)(9.81)
    T1 = 49.05

    T2 = m2g
    T2 = (3)(9.81)
    T2 = 29.43

    Is that right? Is the answer (d)?
     
  4. Dec 11, 2012 #3
    Re: Find the tension T of the two blocks. I think I'm doing something wrong :(

    That looks right.
    T2 has to support 3kg, and T1 has to support 5kg.

    You can also check this by looking at the forces on m1 :
    T1 = m1g + T2
    Your answers agree with this.
     
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