Four forces of flight
An airplane moves through air while four forces act on it.

Picture in words: 1. Lift: Air moving around the wings creates lift. Wings also turn airflow downward.
2. Weight: Gravity pulls the airplane toward Earth.
3. Thrust: A propeller or jet engine provides a forward push.
4. Drag: Air resistance opposes motion through the air.

One more wonder: In straight, level flight at steady speed, lift balances weight and thrust balances drag.
A simplified force map, not instructions for flying.

Question: Which force pulls an airplane toward Earth?
Answer: Weight

Sources:
NASA: aerodynamics — https://www.nasa.gov/learning-resources/for-kids-and-students/what-is-aerodynamics-grades-5-8/

Reviewed 28 September 2026. Simplified educational illustration, not to scale.
https://atherverse.com/kids/how-things-work/airplanes/