Thursday, September 22, 2011

Lift

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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