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Homework Help: Finding work done by a escalor

  1. Nov 2, 2008 #1
    1. The problem statement, all variables and given/known data
    Mass=57.1 Kg
    Distance 69.5 m
    G= 9.8
    Theta= 34.9
    So I'm trying to find the amount of work done on mass.

    2. Relevant equations

    3. The attempt at a solution
    Okay so i started out finding Force by newtons 2nd law.
    Okay so then I went with force to the work fomula.
    and that gave me 31896.37
    but this answer proved to be incorrect?
  2. jcsd
  3. Nov 2, 2008 #2


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    Staff Emeritus
    Science Advisor

    Why cos(theta)? Over what height is mass (or weight) lifted?
  4. Nov 2, 2008 #3
    good question.
    sin would prehaps be more fitting =)
  5. Jul 12, 2010 #4
    I have a similar problem like this so if I was to solve this problem would it go like this:

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