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 ??