1. Physics 11 Mr. Jean September 19 th, 2011

2. The Plan: Video of the day Physics text books Constant acceleration question Review of acceleration Free falling Constant Acceleration due to gravity Finish “star stuff”

3. Textbooks: We have the library booked between now and 9:40 to get our textbooks. Please get out any text books you need you other classes.

4. Quiz Outline: 1) Re-arranging equations. 2) Scientific Notation. 3) First 3 constant acceleration equations. 4) Something from Quantum Futures

8. Constant acceleration model with unknown acceleration: x f - x i = ½ (v i + v f ) t x f = Final distance (m) x i = Initial distance (m) v f = Final velocity (m/s) v i = Initial velocity (m/s) t = time (s)

9. Free Falling Objects: When an object is dropped. –1) There is NO account for air resistance. –2) All Free-Fall objects fall at the same rate –What happens when there is no gravity?

10. Acceleration of Gravity on Earth: a = ∆v = -9.8m/s ∆t 1s

11. How gravity is calculated on Earth and other planets: g = acceleration due to gravity (m/s²) G = universal gravitational constant (m³/kg/s²) M = mass of the body (kg) r = radius of the planetary body (m)

14. Strobe Light Demonstration: I have never done this before… If I use a strobe light in class is this going to be a problem for anyone?

15. Strobe Light Demonstration: Key points: –Falling droplets of water over a constant time frame. –Each drop with a different degree of separation from the previous. –The pattern of drops SHOULD (haha) resemble the image on the left.

16. Time (s)Velocity (m/s) 00 1- 9.8 2- 19.6 3- 29.4 4- 39.2 5- 49.0

17. Representing Acceleration due to gravity on a graph: ∆d(m) vs. ∆t(s)∆v(m/s) vs. ∆t(s)

18. Watch this video: Airbus A380-800 Braking testing: Using our formulas what can you find with this information?

19. v = v o + at

20. Formula 1 vs. BMW What can we find here?