Final answer:
If the applied force is less than or equal to the maximum static friction, the box will not move. In this case, the applied force of 40N is less than the maximum static friction of 50N, so the box will not move.
Step-by-step explanation:
The resulting effect depends on the friction between the box and the surface it is placed on. If the applied force is less than or equal to the maximum static friction, the box will not move. In this case, the applied force of 40N is less than the maximum static friction of 50N, so the box will not move. However, if the applied force exceeds the maximum static friction, the box will start to move, experiencing kinetic friction instead.