Lift generation refers to the process by which an object, such as an aircraft wing or a helicopter rotor, creates upward force to counteract gravity. This force is produced when air flows over and under the surface of the object, resulting in differences in air pressure. The shape and angle of the object, known as the airfoil, play a crucial role in determining how effectively lift is generated. In aviation, lift is essential for flight, allowing aircraft to ascend, cruise, and land safely. The principles of lift generation are governed by Bernoulli's principle and Newton's third law of motion, which explain how changes in airspeed and direction contribute to the upward force. Understanding lift is fundamental for pilots and engineers in designing efficient flying machines.