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Homework Help: Minimum value of coefficient of friction

  1. Jul 20, 2017 #1
    1. The problem statement, all variables and given/known data

    Ans: c)

    2. Relevant equations

    3. The attempt at a solution

    I can solve this problem if only I understand the setup . I am sure the diagram is missing something .

    Can someone help me understand the problem statement in context of the setup ?

    Attached Files:

  2. jcsd
  3. Jul 20, 2017 #2


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    It looks to me that the diagram is missing a string. Probably from the lower pulley to the block with mass 2m, but I did not check that this leads to the given answer.
  4. Jul 20, 2017 #3


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    It does.
  5. Jul 20, 2017 #4
    Thanks both of you .
    Last edited: Jul 20, 2017
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