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Bernoulli's Principle

Bernoulli's Principle. Bernoulli's Principle. States that as the speed of a moving fluid increases, its pressure decreases. EX: A shower curtain starts swirling around your legs in a hot shower. Plane wings. How do planes work? Wing shape!. Wing Shape.

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Bernoulli's Principle

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  1. Bernoulli's Principle

  2. Bernoulli's Principle • States that as the speed of a moving fluid increases, its pressure decreases. • EX: A shower curtain starts swirling around your legs in a hot shower

  3. Plane wings • How do planes work? Wing shape!

  4. Wing Shape • According to Bernoulli's principle, the faster-moving air above the wing exerts less pressure than the slower-moving air below the wing. • Lift - Increase in pressure exerts an upward force which pushes the wings and the plane upward against gravity

  5. Thrust and Wing size determine lift • Thrust – the forward force produced by the plane's engine • Birds do not have engines, so they flap their wings to create thrust

  6. Drag • Drag – force that opposes or restricts motion in a fluid • EX: Wind on your clothes creates drag, causing you to move slower • Flaps on wings can be used to change the shape or area of wing, to reduce drag and increase lift • Birds do the same with their feathers

  7. Wings are not always required • Any time fluids are moving, Bernoulli's principle is at work • EX: Baseball, Frisbee

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