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Homework Help: What input work is required for this machine

  1. Apr 27, 2010 #1
    1. The problem statement, all variables and given/known data
    a 25% efficient machine performs external work of 200 J. what input work is required?..please answer,,is the answer is 800 J?



    2. Relevant equations



    3. The attempt at a solution
    800 J
     
  2. jcsd
  3. Apr 27, 2010 #2

    tiny-tim

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    welcome to pf!

    hi hisbul! welcome to pf! :smile:
    yup! :biggrin:
     
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