1. Bernoulli’s Principle
Unit A/B: Air and Flight #3

2. Let’s Do a Demonstration!

3. What do you think is happening?
Make an inference!
Leaves rustling in the air

4. Good Note-taking Skills
Come to class prepared
Start each day with a new page, a title and the date
Don’t use full sentences
Find a method that works for you
Good Note-taking Skills
How would you take notes from reading a paragraph or text?

5. So, What are the properties of air?
Air exists
Air is matter
Air takes up space
Air has mass
Air exerts pressure
Air can be compressed
Air is a fluid

6. tHE MAN BEHIND THE PRINCIPLE
Daniel Bernoulli

7. Facts about Bernoulli (1700-1782)
A Swiss Mathematician
Explained how fluids, like air and water, flow
Published his book “Hydrodynamica” in 1738

8. The Principle Behind the Man

9. So, why is this guy so famous, anyways?
Bernoulli discovered
As the speed of a moving fluid increases, the pressure within the fluid decreases.
So - with air
As the speed of air increases, the lower the pressure
What direction does air move? High pressure to low or low pressure to high?

11. So, now that we know the principle…

12. What happened to the balloons?
As I was blowing in between the balloons I was making air flow FASTER
This means that the pressure DECREASES in between the balloons
Air moves from high to low pressure so the balloons were pushed inwards towards each other

13. How do we use this principle in real-life?

14. Airplanes!
Aircraft wings are designed so that air flows over the top of the wing faster than it flows under the wing.
This causes the air pressure on top of the wing to be lower.
The comparatively higher air pressure underneath the wing pushes the airplane up and LIFT is created

16. The force is with us...

17. 4 Types of Forces There are 4 forces acting on anything in flight
Lift, Drag, Thrust, and Gravity

18. Next up: The Forces Awaken!