BERNOULLI’S PRINCIPLE

Bernoulli's principle and Venturi tubeBernoulli’s principle  states that when  a fluid flowing through a tube reaches a constriction or narrowing  of the  tube  the speed  of  the  fluid  passing through the constriction is increased and its pressure is decreased.

Source: http://www.tpub.com

HOW AIRPLANES FLY ?

What makes an airplane get off the ground and stay in the air? Easy to understand, the film combines animation and live sequences to explain everything about basic aerodynamics. Forces of lift, weight, thrust and drag are shown in relation to flight.