1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    User Avatar
    Science Advisor
    Homework Helper

    welcome to pf!

    hi hisbul! welcome to pf! :smile:
    yup! :biggrin:
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook