Lift (Physics)

Lift in physics refers to the force that allows an object, such as an airplane wing, to rise against gravity. It is generated when air flows over and under the wing, creating a difference in pressure—higher pressure beneath the wing and lower pressure above. This pressure difference results from the wing’s shape and angle, which redirects airflow. According to Bernoulli’s principle and Newton’s third law, the wing's design causes air to move faster over the top, reducing pressure, and pushes the wing upward. Lift must overcome gravity for the object to ascend or stay afloat in the air.