Air Flow -

: According to the NASA Bernoulli's Principle guide , when air moves more quickly over a curved surface (like the top of the paper), the air pressure decreases. The relatively higher atmospheric pressure underneath then pushes the paper upward.

: Some researchers argue that the lift is better explained by the change in momentum as the airflow is deflected downward by the paper's shape, resulting in an equal and opposite upward force. air flow

While frequently attributed solely to , the full explanation involves several interacting physical concepts: : According to the NASA Bernoulli's Principle guide