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Infinite Mass and Finite Tension over a pulley

  1. Jul 6, 2011 #1
    1. The problem statement, all variables and given/known data

    Two masses hang across a massless, frictionless pulley. As the masses become infinitely large, the tension becomes:



    2. Relevant equations

    F=ma



    3. The attempt at a solution

    Can someone please help me understand how two masses suspended over a pulley can increase in mass infinitely while the tension in the rope suspending them will not exceed 1000 N? The way I have viewed it is that F=ma and as m increases so will force despite the fact that gravity is a constant acceleration. Thanks for any help provided.
     
  2. jcsd
  3. Jul 6, 2011 #2

    SammyS

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    It looks like you haven't given us the whole problem.

    Where does 1000 N come from ???
     
  4. Jul 7, 2011 #3
    Right, so it is actually multiple choice:

    A.) O N
    B.) 500 N
    C.) 1000 N
    D.) Infinite

    The back of my book says the anser is 1000 N, but I do not understand how this is possible. Thanks again for the help.
     
  5. Jul 7, 2011 #4

    SammyS

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    Is there any more information given in the problem, such as the maximum tension at which the rope is rated?
     
  6. Jul 8, 2011 #5
    What about infinite ?
     
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