Answer : Balanced force, Net force = 0
Explanation :
In balanced force, two equal and opposite forces are applied in order to make net force on the object equals zero.
In this case, Gustavo and Beatriz are pushing on a door in opposite directions. As a result, the door does not move at all. This shows that the forces acting on the door are balanced.
Hence, the forces are balanced and the net force is zero.
