Final answer:
The net force acting on the box is 12 N to the left.
Step-by-step explanation:
The magnitude and direction of the net force acting on the box can be found by adding up all the individual forces acting on it. In this case, the net force is the sum of the forces:
- Fr = 12 N to the right
- F = 15 N to the left
- F = 3 N to the left
- F = 12 N to the right
To find the net force, we can simply subtract the forces acting in opposite directions. Adding up the magnitudes of the forces and taking into account their directions, we find that the net force is 12 N to the left.