2009 winning techno challenge powerpoint. by Justin and Josh

1. By Joshua Wigley & Justin Thomas Ruskin Park Primary School

3. Boomerangs were first invented by the aboriginals. They were hunting for a kangaroo and threw a stick that they had made it missed the kangaroo and came back. They had accidently created a boomerang . Boomerang in aboriginal means birgan and barragadan

6. Diagrams of a gyroscope. The precessional movement is the same for when a boomerang spins around and returns to the thrower.

8. This is the spin axis on the boomerang . Here is a diagram of a boomerang showing the point where the spin axis is.

9. These are videos of us using a wheel and a toy to show how a gyroscope works.

15. Safety first when playing with Boomerangs. Safety first when playing with Boomerangs .

22. Secret talent We found out that our Japanese teacher taught how to throw a boomerang when he went to Japan. He made a boomerang and he let us use it.

23. THIS WAS THE FUN PART – TRYING TO THROW THE BOOMERANG Mr Brown showed us how to check the wind direction and how to position the boomerang and which direction to throw it in. We tried and tried and tried but couldn’t get it to come back without any wind. Even Mr Brown had trouble.

24. Here is a video of a man throwing a boomerang and it actually came back. He throws the boomerang very powerfully

25. At school our teacher Mr Brown showed us how to throw a boomerang. This is us trying our hardest. But without any wind it was difficult.

26. We found that one of our teachers at Ruskin Park is actually a boomerang expert. He showed us how to throw the boomerang correctly. It’s good to actually try out what we learned.

28. We made our own boomerangs Josh made these boomerangs from cardboard. We tried them out and compared them to the traditional style. Josh made six different Boomerangs so we could test and see which one was the best. BEST WORST

29. We tested them too It worked – how good was that!

30. The boomerang in action This animation is from the internet

32. There are lots of songs about boomerangs . The most famous Aussie song is called “ My Boomerang won’t come back”. Slim Dusty wrote one called “Boomerang” ABBA also had a song called Bang a Boomerang and John Williamson had one called Boomerang Café.

36. Wrong Answer Try again

37. Right Answer Continue

39. Wrong Answer Try Again .

40. Right Answer Continue

41. How did you go? Good Bad

42. Well done, now you can enjoy our bloopers. Continue

43. Never Mind. You can watch the presentation again or just enjoy the bloopers that follow. Continue

44. Bloopers All good movies have bloopers don’t they?

45. Testing is great fun! I can catch it!

46. The real ending….. Thanks for watching.

47. What’s next ? Learning about the boomerang has made us wonder how so many other things might work. Airplanes Helicopters Hover Craft Hot Air Balloons Gliders Space Ships Kites Watch this space …….