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Exploring Buoyancy and Aerodynamics: Why Things Float and Fly

Delve into the fascinating world of fluid dynamics with an exploration of buoyancy and aerodynamics to understand why objects float and fly. Learn about drag, lift, density, and volume displacement through engaging activities and examples.

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Exploring Buoyancy and Aerodynamics: Why Things Float and Fly

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  1. Buoyancy & Aerodynamics Jeff Rhoads & Terry Ballinger WHY THINGS FLOAT AND FLY MST @ MSU 2006

  2. Outline • Introduction • What is a Fluid? • Aerodynamics • Buoyancy • Today’s Activity

  3. Introduction • Aerodynamics – Why things fly • Lift • Drag • Buoyancy – Why things float • Density • Volume Displaced … concepts involve fluids.

  4. What is a Fluid?

  5. What is a Fluid? • A substance tending to flow or conform to the outline of its container What are some other examples?

  6. Aerodynamics

  7. Aerodynamics • The study of forces and the resulting motion of objects that move through the air. … drag & lift are important.

  8. Example: Jet Airliner … drag & lift are important.

  9. Drag • Opposing force (opposite to direction of travel) due to motion through the air

  10. Drag • Opposing force (opposite to direction of travel) due to motion through the air Friction Drag

  11. Drag • Opposing force (opposite to direction of travel) due to motion through the air Friction Drag Pressure Drag

  12. Lift • Upward force due to motion through the air

  13. Lift • Upward force due to motion through the air

  14. Why it Flies

  15. Buoyancy

  16. Buoyancy • The tendency of a body to float or to rise when submerged in a fluid

  17. Archimedes Principle • A body immersed in a fluid is buoyed up by a force equal to the weight of the fluid it displaces.

  18. Will it Float? What forces act on the object? Object

  19. = W Weight Will it Float? = B Buoyancy Force

  20. = W Weight Will it Float? = B

  21. = W Weight Will it Float? = B

  22. = W Weight Will it Float? = B

  23. Will it Float? = W = B

  24. Will it Float?

  25. Will it Float? Object Object Hovers

  26. Will it Float?

  27. Will it Float? Object Object Ascends

  28. Will it Float?

  29. Will it Float? Object Object Sinks

  30. Example: A Ship USS Dwight D. Eisenhower Weight: 95,000 tons

  31. Today’s Activity: Airplanes! Objective Create a set of paper airplanes capable of traveling the furthest, staying aloft the longest, and …

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