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Understanding Bernoulli's Principle: How Fluid Dynamics Powers Flight and Everyday Life

Bernoulli's Principle states that as the speed of a moving fluid increases, its pressure decreases. This principle is demonstrated in daily occurrences, such as a shower curtain swirling around your legs in a hot shower. In aviation, the shape of a plane's wings plays a crucial role; the faster-moving air above the wing exerts less pressure than the slower-moving air below, creating lift. Additionally, concepts like thrust from engines and drag impacting motion reveal the physics at play in both aircraft and nature. Understanding Bernoulli's Principle enriches our appreciation for fluid dynamics.

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Understanding Bernoulli's Principle: How Fluid Dynamics Powers Flight and Everyday Life

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Presentation Transcript

  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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