What force acts to push the aircraft upward, away from Earth's surface?

Lift is the force that acts to push the aircraft upward, away from Earth's surface. It is generated primarily by the wings of the aircraft as air flows over and under them. The design and shape of the wings create a difference in air pressure; higher pressure below the wing and lower pressure above it generate an upward force. This upward force is essential for overcoming the weight of the aircraft, allowing it to ascend into the sky.

In contrast, weight is the gravitational force pulling the aircraft downward, while drag refers to the resistance encountered as the aircraft moves through the air. Thrust is the forward force produced by the engines, necessary for propelling the aircraft forward but not directly responsible for lifting it into the air. Understanding lift is crucial for piloting and aviation science, as it plays a vital role in achieving and maintaining flight.