Consider the forces acting on the block. Depress mouse to view answer. Gravity is Present. 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.