Since the block has mass, there is a gravitational force on it. Depress mouse to view answer. Spring force is Absent. Since no spring is touching the box, there is not a spring force on it. Depress mouse to view answer.
Tension is Present.
Since an unrelaxed string is attached to the block, there is a tension force on it. Depress mouse to view answer. Normal is Absent. Since the block is not supported by any surface, there is not a normal force on it. Depress mouse to view answer.