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Atwoods Machine Problem

  1. Nov 1, 2008 #1
    1. The problem statement, all variables and given/known data

    Two masses are connected over a pulley which has a friction resistance of 0.147 N. What is the minimum mass difference to cause the pulley system to have a non-zero acceleration when released from rest? Total Mass = 250 g

    2. Relevant equations

    a= g[(m))/((M)]- f/((M)) Or

    a= g[(m))/((M)]

    m = mass difference
    M = Total mass

    3. The attempt at a solution

    I just need to get started off in the right direction, as i don't really understand the question
  2. jcsd
  3. Nov 1, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    One side must pull down on the pulley with a force that is 0.147 N greater than the other. Hint: How does the weight of masses relate to the tension in the rope?
  4. Nov 1, 2008 #3
    Can i just plug in all the values in the equation a= g[(m))/((M)]- f/((M)), and a = 0 and solve for m?
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