Activity 4.2.3 Airfoils, Lift and Bernoulli's Principle



Introduction:Daniel Bernoulli, an eighteenth-century Swiss scientist, discovered that as the velocity of a fluid increases, its pressure decreases. What Bernoulli was able to show is what is sometimes called Bernoulli’s law of pressure differential for fluids. According to aerodynamics, air is a fluid. Therefore, this pressure difference is important. During this activity, you will discover why.Assignment:Answer the following guided notes as Mr. Follansbee presents the PowerPoint: 4.2.3 Airfoils, Lift, and Bernoulli’s Principle. In order to understand lift, complete the following definitions and label the parts of the wings in the sketches below.Bernoulli’s principle states that:Bernoulli proved that when fluids move _________________, their pressure ____________________. So the air pressure above the wing is _____________ than the air pressure below the wing. Lift occurs because there is ____________ pressure below the wing.List and describe three major factors that affect lift.Airfoil shapes are designed to generate as much ____________ as possible while incurring as little ______________ as possible.List six factors that affect the amount of lift produced by an airfoil.ConclusionWhat is the difference between a fin, a wing, and an airfoil? What are three major factors that can change the velocity and pressure of air flow around a wing and thus increase the amount of lift?In your own words, how is lift created with an airfoil?What two scientific laws or principles contribute to the total amount of lift?Based on what you have already learned, do you think any shape will work for an airfoil? Why or why not?Why is air considered a fluid? (What is the definition of the term “fluid”?)A scientific principle differs from a scientific law because it is unproven. What two major flaws do you see with Bernoulli’s Principle? ................
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