Thursday, July 30, 2009 ; Presentation on 6 Jul (Thu)
Dear class,
We've got 5 periods aka 2.5 hours aka 150 min.
8 min per group, 5-6 min for feedback
Order of Presentation (based on email):
1) Esmond's Group
2) Michelle's Group
3) Jia Yuan's Group
4) Jinjie's Group
5) Zijun's Group
6)
7)
8)
9)
10)
Posted by Mr Wan
posted by Allan at
3:31 PM
6 Comments:
Mr Wan we cant write the relation as the information is not..um... i dont know how to say but its like first one 4s plus then 3 seconds then 5 seconds so its not really accurate.We dun have stopwatch either so cannot redo. As what u said do something like 1cm extension is the best.blabla but that isnt relation is it?
--yun ling--
Mr Wan, our timing is like also not so accurate 'cos our timing is not reasonable.
That is a relationship.
Length of wings does not affect duration proportionately. It doesn't mean the longer the wings, the longer the spinner will stay in the air.
There is a certain length that suits paper spinner and length beyond or lower than that will cause the spinner to reach the ground faster.
Ok, thanks for the info, Mr Wan
Maybe I give an example of how the relation sounds.
Let's say the spinner floats for a longer time in the air when the length of the wings are extended by 2 cm each.
If the wings is extended beyond 2 cm, it will land faster.
If the wings is extended less than 2 cm, it will also land faster.
The relationship will be written like this:
The time taken for the spinner to stay afloat in the air will increase with the length of the wings of the spinner until the wings are 8 cm each. Beyond 8 cm, the time taken will start to decrease.
I think the relationship is better described in the PowerPoint using the table showing the length of the extended wing and the average time.
haiyoo!! still cannot write.
control: 3.80
1cm extention: 4.26
2cm:3.42
3cm:4.23
--yun ling--
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