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Homework Help: Pulley System Problem

  1. Oct 15, 2014 #1
    Question Summarized:
    The box in the middle is remains motionless; how much mass was placed in box 3?

    box 1: 35kg
    middle box: 95 kg
    box 3: ? kg

    Attempt at the problem:

  2. jcsd
  3. Oct 15, 2014 #2


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    2017 Award

    Staff: Mentor

    It would be easier for us if you typed your attempt here.

    Check your answer with a calculation for the left mass. Do you see a problem?

    The problem statement says the middle mass remains motionless, this does not have to be true for the other masses.
  4. Oct 15, 2014 #3


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    Science Advisor
    Homework Helper
    Gold Member

    you should consider that boxes 1 and 3 might not be at rest.
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