Date: Thu, 21 Feb 2002 17:29:48 -0700

Author: Jerry DiMarco

Subject: Re: "Newton's Cradle," but with gain


Could you make it with ring magnets? Balls would be held inside the
ring magnets, and collisions would involve only the balls...


At 2/22/2002 12:11 AM, you wrote:
>Bill et al.
>This is something I have build a few years back and I even discussed it on
>this list at that time. Some people have inquired then and I explained how
>I did it. So it is kind of interesting to have the exact thing pop up now
>as something new. My setup looks very similar but I have even more pairs of
>steel balls stuck to strong neodym magnets mounted along a long aluminium
>rail. The device works well but one problem is the decreasing of the
>magnetic remanence due to the knock the magnets get every time from the
>accelerated balls every time you let the gun shoot. I wonder if Mr. Fields
>solved this problem with his device.
>Anyway it is a fun device to watch and contains quite evolved physics.
>Take care and kind regards
>Urs Lauterburg
>Physics Demonstrator
>University of Bern