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Output Work

  1. Nov 18, 2015 #1
    1. The problem statement, all variables and given/known data
    You apply 14,500 J of work to one end of a crowbar. If the crowbar is 1.2 m long, how much work is produced by the crowbar? (friction is not a factor)

    2. Relevant equations
    Work=distance*force

    3. The attempt at a solution
    There's hardly any information in this question so the only thing I can think to do is multiply the two numbers. That would give you 1.74 x 104 J which would make the output greater than the input which isn't allowed, right?
     
  2. jcsd
  3. Nov 18, 2015 #2

    DrClaude

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    Staff: Mentor

    No, that would give 1.74 x 104 J m, which are not proper units for work.


    Conservation of energy is indeed a good place to start.
     
  4. Nov 18, 2015 #3
    would the output just be equal to the input then?
     
  5. Nov 18, 2015 #4

    DrClaude

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    Staff: Mentor

    Yes, if you can neglect any work done on the crowbar itself.
     
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