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Homework Help: Kinetic energy and Work

  1. Mar 21, 2014 #1
    1. The problem statement, all variables and given/known data
    A 100 kg refrigerator is on rest on the floor.How much work is needed to move the refrigerator at a constant speed for 6 m along with a floor friction force of 200 N ?


    2. Relevant equations
    I used ΔK = W(Fg)+ W (N) + W(f)+ W(T) =0
    and W(Fg)+ W (N) = 0
    so W(T)=-W(f)=f* Δl
    3. The attempt at a solution

    The needed work is W(K)= 1200 J

    Is it correct ??
     
  2. jcsd
  3. Mar 21, 2014 #2
    Looks correct to me!
     
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