Which statement best describes drag in flight?

Which statement best describes drag in flight?

• A. Drag is the aerodynamic force that opposes the aircraft's forward motion.
• B. Drag is the lift produced by the wings.
• C. Drag is thrust.
• D. Drag is the weight of the aircraft.

Answer: (A)

Drag is the aerodynamic force that opposes the aircraft’s forward motion. It arises from the air interacting with the aircraft and acts opposite to the direction of travel, meaning it points backward along the flight path. This is different from lift, which acts upward to support the weight; from thrust, which pushes the aircraft forward; and from weight, which pulls downward due to gravity. In level flight, thrust must balance drag just as lift balances weight, so crews and engineers focus on reducing drag through streamlined design and clean surfaces to improve efficiency and performance.

Drag is the aerodynamic force that opposes the aircraft’s forward motion. It arises from the air interacting with the aircraft and acts opposite to the direction of travel, meaning it points backward along the flight path. This is different from lift, which acts upward to support the weight; from thrust, which pushes the aircraft forward; and from weight, which pulls downward due to gravity. In level flight, thrust must balance drag just as lift balances weight, so crews and engineers focus on reducing drag through streamlined design and clean surfaces to improve efficiency and performance.