<human>:  How does aerodynamics affect the flight of a commercial airplane?
<bot>: Aerodynamics plays a key role in the flight of a commercial airplane. The aerodynamic forces on an aircraft allow it to lift off the ground, fly and maneuver in the air, and ultimately land safely. Aerodynamics affects an aircraft's ability to climb, descend, turn, and cruise at certain speeds and altitudes. The airfoil shape of the wings and the design of the fuselage and tail provide the necessary lift to sustain the aircraft in flight. As the aircraft moves through the air, the wings force the surrounding air downwards creating lift, which helps the aircraft achieve and maintain altitude. The aircraft's thrust must also be taken into account for successful flight, as this works against any drag that the wings create due to air resistance. The engines generate thrust which is used to combat the effects of drag, allowing the aircraft to continue along its path in the air.