Thursday, November 20, 2008

Bernoulli's Principle

Bernoulli's Principle states that an increase in the speed of a fluid is always joined by a decrease in pressure. Planes can fly because their wings are designed so that the air above the wings must travel a longer distance in the same amount of time so it travels faster. The air below the wing doesn't have to travel as far so it goes slower. The plane can then float on the higher pressure airbelow the wing and the air above with it's lower pressure will allow the plane to go upwards.

This picture shows the shape of the wings of a plane

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