Multiple choice

Which of the following is a force acting on an airplane in flight?

  1. Weight

  2. Lift

  3. Thrust

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Four fundamental forces act on an aircraft in steady flight: lift (opposes weight), weight (gravity pulling down), thrust (propels forward), and drag (opposes thrust). All of these forces are constantly acting on the airplane. The question's phrasing is slightly awkward since it asks 'which is a force' (singular) but the correct answer acknowledges that all listed forces act simultaneously.

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