How Much Work Is Required to Move a Refrigerator Across a Frictional Surface?

[physicos]

Homework Statement

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 ?

Homework Equations

I used ΔK = W(F_g)+ W (N) + W(f)+ W(T) =0
and W(F_g)+ W (N) = 0
so W(T)=-W(f)=f* Δl

The Attempt at a Solution

The needed work is W(K)= 1200 J

Is it correct ??

 

[Rellek]

Looks correct to me!