Date: Thu, 08 Mar 2012 06:41:26

Author: --- "Anthony Lapinski"

Subject: Re: Centripetal puzzle

Post:

These are nice but overpriced. I got some free ones at various
conferences. You also have to flick it just right.

I have one of these, which is large and easy to spin:

http://www.amazon.com/Think-Fun-1300-Aha-Uphill/dp/B000GHX0RC/ref=sr_1_1?ie=UTF8&qid=1331206661&sr=8-1

But with shipping. it's overpriced. You can find them much cheaper in toy
stores.


tap-l@lists.ncsu.edu writes:
>Luke,
>
>I have a couple of the smaller versions of the puzzle you describe but
>haven't seen any on the market for a couple of years. The nearest to it
>I know of is # PUZ-120 from Educational Innovations.
>www.teachersource.com
>
>Dale
>
>On 3/7/2012 12:22 PM, Luke Donforth wrote:
>> Hello all,
>>
>> I was looking to buy a couple of centripetal puzzles where you spin them
>> to get the balls to go to opposite ends
>>
>> (number 4 at
>http://calpoly.edu/~phys/physdemo/mech/cen_for/cen_for.html)
>>
>> I could make some, but I know these are commercially available, and I
>> didn’t want to iteratively design the optimal curve. Anyone got a
>source
>> for these?
>>
>> Thanks
>>
>> Luke Donforth, Ph.D.
>>
>> Staff Scientist
>>
>> CT Science Center
>>
>> 250 Columbus Blvd.
>>
>> Hartford, CT 06103
>>
>> 860-520-2122
>>




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