Date: Wed, 07 Mar 2012 15:22:08
Author: --- "Dale E. Stille"
Subject: Re: Centripetal puzzle
Sorry, there is nothing there. I was thinking I also got them from
Educational Innovations, but can't find anything to tell me that is the
On 3/7/2012 1:29 PM, Luke Donforth wrote:
> Huh, hadn't seen the coin one. Neat :-) Thanks Dale.
> Do you have a maker or puzzle name on the small ones you have? It's not clear to me what to even search for.
> As a first order solution, I glued two 2L coke bottle bottom-to-bottom and put a marble in each one. It actually works reasonably well (remember to put the caps back on). Not very elegant, but it's still the puzzle.
> Luke Donforth, Ph.D.
> Staff Scientist
> CT Science Center
> From: email@example.com [firstname.lastname@example.org] On Behalf Of Dale E. Stille [email@example.com]
> Sent: Wednesday, March 07, 2012 2:03 PM
> To: firstname.lastname@example.org
> Subject: Re: [tap-l] Centripetal puzzle
> 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
> 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
>> didnít want to iteratively design the optimal curve. Anyone got a source
>> for these?
>> Luke Donforth, Ph.D.
>> Staff Scientist
>> CT Science Center
>> 250 Columbus Blvd.
>> Hartford, CT 06103