Final answer:
To find the net force on the falling object, subtract the air resistance from the object's weight, resulting in a net force of 24 N.
Step-by-step explanation:
The magnitude of the net force on a 30 N falling object that encounters 6 N of air resistance can be found by subtracting the air resistance from the weight of the object, since they are acting in opposite directions. The net force (Fnet) on the object would be the difference between these two forces:
Fnet = weight - air resistance
Fnet = 30 N - 6 N
Fnet = 24 N
Therefore, the net force exerted on the object is 24 N.