Lift
What is it?
Lift is the force that makes an airplane wing or helicopter rotor rise and helps the aircraft escape the pull of the earth (gravity). Lift is a product of differences in air pressure and is based on the Bernoulli Principle.
Give me an example!
Have you ever noticed how a hawk soars effortlessly in circles in the sky on a summer afternoon? The hawk is giving his wings a rest by taking a free ride on rising, heated columns of air called thermals that provide lift.
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