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Coupled Motion Pulley Problem

  1. Sep 15, 2011 #1
    1. The problem statement, all variables and given/known data
    The pulley is essentially weightless and frictionless. If M1= 10.0 kg and the second mass M2 weighs 98.1 Newtons, what is the tension in the rope and the acceleration of M1 ?

    2. Relevant equations
    FT=mg
    F=ma

    FT = tension
    m=mass
    g=gravity (9.81)
    a=acceleration

    3. The attempt at a solution
    FT=mg ---> FT=(10)(9.81) = 98.1 Newtons

    a= FT / m
    a= 98.1/10 = 9.81 m/s2


    The tension answer is right, but the acceleration should be 0. How would it be 0?
    What am i doing wrong? Thanks.
     
  2. jcsd
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