Which force is rearward and retarding due to disruption of airflow by the wing and fuselage?

• A. Lift
• B. Weight
• C. Drag
• D. Thrust

Answer: (C)

Drag is the force that opposes the aircraft’s forward motion. It arises because the airflow is disturbed by the wing and fuselage, creating friction and pressure differences around the surfaces. This disturbance produces a rearward force that slows the airplane. Lift acts upward and perpendicular to the flight path, weight pulls downward due to gravity, and thrust pushes forward. Because the question describes the rearward, retarding effect caused by airflow disruption from the airframe, drag is the correct concept. Drag includes parasite drag from form and skin friction as well as induced drag related to lift, but the key idea is that it acts opposite the direction of travel and retards forward motion.