[ISTA-talk]Re: ideas please

[Michael Lach]

On 9/10/01 4:18 PM, "Barbara Sandage" <[EMAIL PROTECTED]> wrote:

> I am a physics teacher who would like the kids build a simple roller
> coaster using a ball as the cart.  Does anyone have any suggestions about
> what to use as a track?  It would have to be flexible and cheap.  I did see
> one idea about using cardboard and taping on sides, but I am looking for
> something different.

Clear plastic tubing works well--most large hardware stores have such in 1"
diameters. I've even been able to get photogates to trigger through it, if
it's kept clean.

-ML


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