Final answer:
The net force on the Nerf football is 7 N in the direction that Student 1 throws it, calculated by subtracting the force of air friction from the force applied by the student.
Step-by-step explanation:
The net force acting on the Nerf football when Student 1 applies a force of 10 N and the force of air friction is 3 N can be determined by subtracting the force of air friction from the force that Student 1 applies. Therefore, the net force = 10 N (force applied by Student 1) - 3 N (force of air friction) = 7 N. This net force is in the direction that Student 1 throws the football.