1. Do You Have A Potential Rocket Scientist In Your Class? Michael West

11. How Do Rockets Work? For every action there is an equal and opposite reaction

13. What About Rockets In Space? In a vacuum what do they push against?

14. The Forces Acting On A Rocket Thrust - From ejecting propellant Weight - Mass of propellant & rocket Lift - Generated by fins & rocket body Drag - Friction from air moving over rocket

15. The Water Rocket Challenge Key Questions Do I have to use water? Is pressurised air good enough? Is more water better? How can I modify the rocket to increase the duration of flight? What effect does the wind have? What launch angle is best for maximum distance?

16. The Water Rocket Challenge Three Award Categories 1.Greatest Altitude Reached 2.Greatest Range Reached 3.Best Rocket Design

17. The Water Rocket Challenge Materials 1x Soft Drink Bottle Cardboard Sticky Tape Scissors

18. The Water Rocket Challenge Determining Altitude: Littlewood’s Law h max = g/8 * (t total ) 2

19. The Water Rocket Challenge Effect of Drag:

21. Some Shameless Promotion MSA/NASA Spaceward Bound Real Fieldwork Expeditions for Teachers July School Holidays 2009 www.marssociety.org.au AIAA Educator Associate Membership Access To AIAA’s Extensive Resources US$200 Classroom Grants Participate In Local AIAA Section Activities It is FREE!www.aiaa.org