Question

Name the applied force in the free body diagram:

Answer 1

The applied force is the force from an external agent that tries to start the motion or stop the motion. Since, the block is being dragged in the horizontal direction, the applied force will be spring balance force because it drags the block to the left. Hence, it is the applied force. The forces in the vertical direction are gravity and normal force and the dotted force is frictional force.

Answer: The spring scale drags the box.

Answer 2

The spring scale dragging the box, since applied force is a force acting on an object due to a person or another object.

Even though the table is an object, the table pushing up is the normal force, which is perpendicular to the contact force.