Answer:
50 J
Explanation:
The net force acting on the box is given by the algebraic sum of the two forces, so:
[tex]F=10 N -5 N = 5 N[/tex]
The net work done on the box is equal to (assuming the net force is parallel to the displacement of the object)
[tex]W=Fd[/tex]
where
F = 5 N is the net force on the object
d = 10 m is the displacement of the object
Substituting,
[tex]W=(5 N)(10 m)=50 J[/tex]