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Homework Help: Newton's Laws with Pulleys

  1. Oct 18, 2007 #1
    1. The problem statement, all variables and given/known data

    A 1.0 kg mass (mA) and a 4.0 kg mass (mB) are attached to a lightweight cord that passes over a frictionless pulley. The hanging masses are free to move. Find the acceleration of the larger mass.

    2. Relevant equations

    Fnet = ma = FB-FA
    Fhanging object=m x acceleration due to gravity

    3. The attempt at a solution

    I've gotten 7.35m/s/s about thirty times now but the homework is on webassign and I only have one last try to get it right. It's high school physics, a college prep class, so I expect someone can figure it out.

    Other

    The masses are on opposite sides of the pulleys.
     
  2. jcsd
  3. Oct 19, 2007 #2

    learningphysics

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    Homework Helper

    It's not 7.35m/s^2... can you show your steps. Then we can point out where you're going wrong.
     
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