An Object Is Acted on by a Drag Force with a Magnitude

question 10

Multiple Choice

An object is acted on by a drag force with a magnitude that is proportional to the speed. The object accelerates downward at 3.00 m/s² when it is falling with a speed 20.0 m/s. What is the terminal speed of the object as it is falling?

• A)38.1 m/s
• B)55.9 m/s
• C)28.8 m/s
• D)65.4 m/s
• E)43.2 m/s

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Definitions:

Airways

The tubes through which air flows from the nose or mouth to the lungs, including the trachea, bronchi, and bronchioles.

Bronchial Tubes

The numerous smaller branches of the bronchus within the lungs, which serve to carry air further into the respiratory system.

Spent Air

Air that has been used in a process and is expelled, often devoid of oxygen or contaminated with pollutants.

Countercurrent Exchange

A mechanism whereby fluids flow in opposite directions to facilitate exchange of heat, gases, or other substances.