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
Answer: D
Physics & Space Science
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