Sci. 3-3

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Sci. 3-3 Bernoullis Principle Pages 73-77
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• Bernoullis Principle- The speed of a moving
  fluid increases, its pressure decreases.
• 1)This causes an imbalance of pressure so
  movement will occur.

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B. Wing design plays a role in helping planes
fly. Wings are often shaped to allow airplanes
to take advantage of decreased pressure in moving
air.
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1) The faster moving air above the wing exerts
less pressure than the slower moving air below
the wing. More pressure on bottom pushes the
plane up.
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C. Lift- an upward force that opposes the
downward pull of gravity.
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D. Lift on an airplane is determined by wing
size and thrust (the forward force produced by
the engine).
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E. If you have more thrust (faster) than a
smaller wing is necessary. Less thrust (slower)-
a larger wing is necessary.
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• Drag opposes motion through fluids.
• Turbulence- irregular or unpredictable flow of
  fluids (air)
• 1) Flaps can change the shape of wings to
  reduce turbulence and drag.