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Homework Help: Tension on strings problem

  1. Dec 7, 2014 #1
    1. The problem statement, all variables and given/known data
    See image attached

    2. Relevant equations

    3. The attempt at a solution
    bii) Tc=mc(a+g)

    Need help on Ci what I did is

    (9x9.81) -uR-6g=10a

    Have no idea what to do though really

    Attached Files:

  2. jcsd
  3. Dec 7, 2014 #2

    Simon Bridge

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    .... this does not follow from b(i). Please show your reasoning.
    ... did you read the hint?
    But you should complete b before starting c.
  4. Dec 8, 2014 #3
    for bii i just assumed the expressions would be the same, how would i go about getting an expression for Tc?
  5. Dec 8, 2014 #4

    Simon Bridge

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    The b(i) equation defines a sign convention ... you should work out the derivation they did using a free body diagram.
    Then for b(ii), you want to do the same derivation, but you have to make sure the sign convention is consistent with the first one.
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