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Homework Help: Work Energy Problem

  1. Apr 8, 2013 #1
    1. The problem statement, all variables and given/known data

    2cpyhpy.jpg

    2. Relevant equations

    W=F*delta x
    Fg = mg

    3. The attempt at a solution
    I just want to know if my answer is correct for question 4.1.2:

    W=Fapp*delta x
    377860 = Fapp*70
    Fapp = 5398N

    Fnet = 0 (constant velocity)

    Fnet = 0
    5398-8-Fg=0
    Fg = 5390

    Fg = mg
    5390 = m*9.8
    m = 550kg

    Correct ?
     
  2. jcsd
  3. Apr 8, 2013 #2

    PhanthomJay

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    looks good!
     
  4. Apr 8, 2013 #3
    So is everything correct and the mass is definately 550kg ?
     
  5. Apr 8, 2013 #4

    PhanthomJay

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    Gold Member

    Why sure, your work is good.
     
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