The Magnitude of the Drag Force of Air Resistance on a Certain

Multiple Choice

The magnitude of the drag force of air resistance on a certain 20.0-kg object is proportional to its speed. If the object has a terminal speed 80.0 m/s, what is the magnitude of the drag force on the object when it is falling with a speed 30.0 m/s?

A) 196 N
B) 7.50 N
C) 15.0 N
D) 73.5 N
E) 42.7 N