Which physical concept describes the force that moves an aircraft forward?

The concept that describes the force that moves an aircraft forward is thrust. Thrust is generated by the aircraft's engines and is essential for overcoming drag, which opposes the aircraft's motion through the air. When an aircraft takes off, thrust propels it down the runway and into the air, allowing it to achieve and maintain flight. This forward force is crucial for achieving the necessary speed to generate lift, which enables the aircraft to ascend and maneuver in the sky. Understanding thrust is fundamental to the principles of flight, as it plays a central role in the performance and control of an aircraft during various phases of flight.