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