The work is equal to the product between the force applied and the distance covered by the box:
[tex]W=Fd[/tex]
In our problem, W=556 J, and d=1.3 m (the box is lifted to a height of 1.3 m, so it covered 1.3 m from its initial point). Therefore we can find the force applied to lift the box:
[tex]F= \frac{W}{d}= \frac{556 J}{1.3 m}=427.7 N [/tex]
