continuation of resultant force

Above figure shows the heavy box suspended by a rope.

When a body is put on the table, the body exerts the force on the table, at the same time the table exerts the force on the body. Suppose a heavy box is suspended by the rope, there are two forces to keep the box suspended, i.e., the tension in the rope and the weight of the heavy box. The rope exerts the force on the box to hold it, while the weight of the box tight the rope to stretch which causes the tension in the rope.
When the system is in equilbrium, then the resultant force
Fr=T-W=0
If the weight of the heavy box is greater than tension in the rope, the box falls down on the ground from the rope.
i.e., there is the resultant force Fr=W-T=+Ve