jesiramoun
stranger

Member Since: 5th Mar 2008
Total posts: 4
Posted:hi!

i'd like to know if there's anyone here on earth that's making--or has made--a RESEARCH PAPER about poi in relation to physics?--motion, velocity, mass, etc(i mean, after all, spinning poi is physics).

i'd like to know where i can read about such please.

do you any links to such?

it would really be of great help.

cheers! biggrin


Delete Topic

pineapple pete
pineapple pete

water based
Location: melbourne
Member Since: 20th Sep 2004
Total posts: 5125
Posted:newtonian circular motion is a good place to start.. its not exactly poi, but its pretty relevant smile

hug:


"you know there are no trophys for doing silly things in real life yeah pete?" said ant "you wont get a 'listened to ride of the valkyries all the way to vietnam' trophy"

*proud owner of the very cute fire_spinning_angel, birgit and neon shaolin*

Delete

Gnor
Gnor

Carpal \'Tunnel
Location: Perth
Member Since: 31st Mar 2003
Total posts: 5814
Posted:NYC did a blurb about it a while back.

Is it the Truth?
Is it Fair to all concerned?
Will it build Goodwill and Better Friendships?
Will it be Beneficial to all concerned?

Im in a lonely battle with the world with a fish to match the chip on my shoulder. Gnu in Binnu in a cnu

Delete

87wt2gxq7
87wt2gxq7

veteran
Location: Birmingham
Member Since: 12th Apr 2005
Total posts: 1502
Posted:I wouldn't have thought anyone would have bothered writing a paper about it as it's all just (hahahaaa "just"!!) circles with varying centres.

Not any groundbreaking physics goin' on there.

You might want to try Richee's posts... if you can decipher them! wink


Delete

Rouge Dragon
Rouge Dragon

Insert Champagne Here
Location: without class distinction
Member Since: 21st Jul 2003
Total posts: 13215
Posted:Or take it as a paper to write yourself!

I know I have more fun on assignments where I actually care about the topic!


i would have changed ***** to phallus, and claire to petey Petey

Rougie: but that's what I'm doing here
Arnwyn: what letting me adjust myself in your room?..don't you dare quote that on HoP...

Delete

oli
not with cactus
Location: bristol/ southern eastern devo...
Member Since: 24th Jul 2003
Total posts: 2052
Posted:basically a poi is a pendulum that is free to move under gravity in 3 dimensions, (spherical pendulum) your hand will provide a driving force of some kind so the basic mechanical system to read about is a driven spherical pendulum...
try searching for spherical pendulum in google if you want to know more...


Me train running low on soul coal
They push+pull tactics are driving me loco
They shouldn't do that no no no

Delete

BurdaA
BurdaA

Sacrebleu
Location: At the quiet limit
Member Since: 20th Jul 2007
Total posts: 377
Posted:Also enjoy a 'centripetal' googlism maybe. Sorry if this obvious.

Poi(poi~y) n. : A Hawaiian food made from the tuber of the taro that is cooked, pounded to a paste, and fermented.
- part owner of Wooktastic

Delete

Kyro
Kyro

member
Location: Portland, OR USA
Member Since: 13th Jun 2001
Total posts: 24
Posted:Regarding physics, I'm not certain what you want to know. The act of spinning poi is basic physics and mechanics (and math).

It would cover:
Gravity
Torque
Centripetal acceleration
Motion/rotation of mass (cubic figure) about an external point
Bodies in motion
Speed of rotation
Moment of inertia

Poi components would consider length of chain, the size and weight of the poi (and drag due to fire - minimal), and applied force.

Its interesting to observe performers spinning poi. When their lines are oblique to their body and the ground most likely they are applying force throughout the spin - meaning they are not allowing gravity to do its job. As a spinner, we only need to exert force to lift the poi. Once the poi reaches the apex of the spin/circle, allow gravity to guide the poi. Poi wants to fall parallel to your body following the same line of motion that lifted it.

It would be cool to see some graphics on this. Guidelines parallel to the axis of the chain, with a right angle at the pois center of mass, and tangent angles identifying loss of energy/applied force. weavesmileyFun stuff!


From the most primitive cultures to the most advanced civilizations,man has had to manufacture things;his well-being depends on his success at production.The lowest human tribe cannot survive without that alleged source of pollution: fire. Ayn Rand

Delete

fanged_angel
fanged_angel

poiromaniac
Location: liverpool, uk
Member Since: 11th Jul 2007
Total posts: 162
Posted:you should read up on uniform circular motion, wiki has some good info on it but i havnt seen anything that covers the fact that poi is a compound pendulum, an your gonna have to take gravtiy into account and air resistance will make a diffence cos poi aint really too aerodynamic and they move pretty fast to. and the poi wont have a fixed point of contact because your hand will move. and things will start to get really complicated when you attatch a tail or start burning fuel or do a weave or an isolation or...

Delete

Gnor
Gnor

Carpal \'Tunnel
Location: Perth
Member Since: 31st Mar 2003
Total posts: 5814
Posted:NYC has a blurb in here with a bit from Jed too
EDITED_BY: Gnor (1204934183)


Is it the Truth?
Is it Fair to all concerned?
Will it build Goodwill and Better Friendships?
Will it be Beneficial to all concerned?

Im in a lonely battle with the world with a fish to match the chip on my shoulder. Gnu in Binnu in a cnu

Delete

georgemc
georgemc

Sitting down facing forward . . .
Location: Christchurch
Member Since: 16th Oct 2006
Total posts: 2387
Posted:and since it's a thread others might be interested in, I'll copy and paste the e-mail reply I sent you:

I think your best bet is to ask Nick Woolsey at Playpoi.com. Nick has spent a lot of time "playing" and analyzing movement including poi movement:
http://www.playpoi.com/poi_mystery
http://www.playpoi.com/poi_yoga_motor_skills
http://www.playpoi.com/SPIn
and I understand he wrote an article about this for a physics journal one time.

my 2c worth. ubbrollsmile


Written by: Doc Lightning talking about Marmite in Kichi's Intro thread

I have several large jars of the stuff. I actually like it... a little. And don't tell anyone I admitted to it.
grin

Delete

Gnor
Gnor

Carpal \'Tunnel
Location: Perth
Member Since: 31st Mar 2003
Total posts: 5814
Posted:I remember when you got two lollies for 2c.

Is it the Truth?
Is it Fair to all concerned?
Will it build Goodwill and Better Friendships?
Will it be Beneficial to all concerned?

Im in a lonely battle with the world with a fish to match the chip on my shoulder. Gnu in Binnu in a cnu

Delete

baby_bear237
baby_bear237

Member
Location: Wisconsin
Member Since: 4th Mar 2008
Total posts: 6
Posted:This is so funny...



I'm re-applying to UW-Madison in the spring to study Physics. Not so long ago, I actually had the idea of doing my thesis on the fundamental and applied physics of poi.



What I find facinating about the topic is its encompassing nature; that is, the number of mechanisms behind spinning fire poi (in particular) is astounding.



The basic laws of motion play the most obvious role, as the poi and its user go through an incredible amount of energy exchange. The poi themselves are propelled and maintained by specific forces, including those that "hinder" its movement (i.e. gravity, air resistance, friction in the chain and handles, etc.). But that's just the beginning.



With fire poi, the study is extended to thermal dynamics. Energy released from the wick is affected not only by the amount of fuel, but the speed of the wick, and perhaps noticibly by atmospheric conditions such as barometric pressure and humidity.



And finally, along with these various objects of study, the incorporation of these mechanisms into the specific rhythms of poi patterns create a symphony of seperate, oscillating physical systems all within a specific segment of space and time.



To summarize, even though fire poi looks really, REALLY pretty, how it works may be even more intricately beautiful.



Wish me luck...I'm not back in school yet. :P


"I wanted to interact, to be more active than passive...I guess I spent all my time watching the music."

Delete


Similar Topics

Using the keywords [physic*] we found the following similar topics.
1. Learn > S-Staff Buugeng > Buugeng Basics > IX | Physical Awareness *help/resource
2. Forums > Can physical events have non-physical causes? [51 replies]
3. Forums > Spinning Weekends/Festivals Directory [54 replies]
4. Learn > Hoop > Hula Hoop > Back Lift *help/resource and producer  chereographer  event organiser  workshop leader  hoop...
5. Learn > Hoop > Hula Hoop > Basic Sustained Spinning *help/resource and producer  chereographer  event organiser  workshop leader  hoop...

     Show more..