Students have been investigating the properties of air and flight. Today we talked about
Bernoulli's Principle: an increase in the speed of a fluid produces a decrease in pressure and a decrease in speed
produces an increase in pressure.
The curved top of a wing creates a longer distance from front to back than the straight bottom. This causes the air on top to travel farther, and thus faster, to reach the back than the air underneath, creating a difference in pressure between the two surfaces
Here's a quick video that explains Bernoulli's Principle.
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