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Engineering mechanics question about weight/cables/pulleys

  1. Mar 28, 2012 #1
    1. The problem statement, all variables and given/known data
    An assembly shown in the picture, GH , HK, HNL are three cables. the mass of box L IS 64Kg,
    a) determine the mass of box K in order to make angle theta as 25 degrees
    b) determine the reaction forces at supports G and N
    c) calculate required cable diameter when tensile strength of the cable is 20MPa


    I cant seem to do these questions and its stressing me out because i could do it before but ive totally forgotten how to now. any help would be more than great!!





    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Mar 28, 2012 #2
    First identify which principles will be involved. In this case, static equilibrium. What do you know about equilibrium that might apply in this case? What other principles might be involved?
     
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