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AerodynamicsQuestion 430 of 934

An airplane flies at 100 knots. It then flies at 200 knots with the same angle of attack. How does the lift change?

  1. Lift is twice as much
  2. Lift is four times as much
  3. Lift is half as much
  4. Lift is one-quarter as much
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Correct answer: Lift is four times as much

Lift is proportional to the square of the velocity. At 200 knots the lift is four times the lift at 100 knots.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 5: Aerodynamics of Flight — Lift, page 101

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Questions last reviewed: 18 October 2026