Date: Sun, 02 Jun 2002 19:01:50 -0400

Author: Dick Heckathorn

Subject: RE: Embroidery Hoop Demo



I have used many size wooden hoops from Walmart. But most of them will
not work.

What you need to do is take the hoops to a table or place them on the
floor. When you find one that does not fall over, it is a keeper.

Next let it roll back and forth until it reaches equilibrium. Mark the
bottom most point. Always place the hoop on a pop bottle with this point

I use chalk on top of the hoop. It breaks into many pieces when a
student does not do it right. When it is done right, the chalk drops
right into the bottle and usually does not break.

Hope this helps. Dick

"Science is nothing more than learning how to communicate with nature in
such a manner that it will talk back."

Helping teachers who facilitate, motivating students who learn.
Dick Heckathorn 14665 Pawnee Trail Middleburg Hts, OH 44130
Physics Teacher CVCA 4687 Wyoga Rd Cuyahoga Falls, OH 44224
330-929-0575 VM 120

-----Original Message-----
[] On Behalf Of Adolf Cortel
Sent: Sunday, June 02, 2002 6:40 PM
Subject: Re: Embroidery Hoop Demo

Hi George,
I use hoops made by cutting cylinders 1 cm wide from PVC pipe of
12 cm of diameter, and I balance a short pencil , about half the length
common pencils. It is easier to balance it if you hold slightly the
and rotate it slowly to find the right position of the flat end of the
pencil on the hoop.
Best regards,

Adolf Cortel
IES Pompeu Fabra
08760 Martorell
Barcelona SPAIN

"George M. Caplan" wrote:

> I am trying to do the embroidery hoop inertia demo.
> I have bought a metal embroidery hoop -- the largest metal one I could
> find at Ames. It is 20 cm in diameter.
> I can easily balance it on a soda bottle, but I cannot balance
> a pen or a pencil or a straw on the top of the hoop.
> What should I do?
> My wife says that largest hoops are available at sewing stores. Is
> what I need?
> How about a wooden hoop? Do they work better?