Transcript Bernoulli’s Principle:

Bernoulli’s Principle
‫ברנולי חוק‬
‫‪Bernoulli’s Principle:‬‬
‫מדען שוויצרי •‬
‫הידוע בעיקר‬
‫בזכות עבודתו‬
‫הקושרת בין‬
‫הלחץ בזורם‬
‫ומהירותו‬
Bernoulli’s Principle
• Pressure in a moving stream
exerts less pressure than the
air surrounding the moving
stream Quick stream = low air pressure
Slow stream = High air pressure
Bernoulli & Flight
• Bernoulli’s
Principle is what
allows birds and
planes to fly.
• The secret
behind flight is
‘under the
wings.’
•The air on top of the wing must travel a longer
distance than the air below the wing. But, air on
both sides must reach the end of the wing at the
same time. Therefore, the air on top of the wing
traveling faster = less air pressure.
Creates Lift
AIR
Below is a NASA illustration of what
surface pressure is exerted on what
surface areas of the wing.
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