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Homework Help: Newton's second law 3 pulley problem.

  1. Oct 20, 2012 #1
    There is no friction and the strings are massless. Find Tension and acceleration.

    3. The attempt at a solution

    1. +T-m1g = m1a
    2. m2g-2t= m2a
    3. +T - m3g =m3a
    4. 2a2 = a1+a3

    g(-m1+m2-m3) + 2a2 = (m1 + m2 + m3)a + a1 + a2

    -29.4 + 2a2 =11a +a1+ a2

    Attached Files:

    Last edited: Oct 21, 2012
  2. jcsd
  3. Oct 20, 2012 #2
    Show some work or we're not allowed to help you.
  4. Oct 20, 2012 #3


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    Homework Helper

    If there is no friction, then the tension in the string connecting the 2kg and 5kg masses should be constant throughout.
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