Re: Loaded dice

[Ludwik Kowalski <kowalskil@MAIL.MONTCLAIR.EDU>]

A strongly loaded wheel will stop with the extra load at
the lowest possible elevation. That is obvious. Right?

On Monday, December 2, 2002, at 04:37 PM, Bob Sciamanda wrote:

> Thanks, Chuck - that certainly will favor "the heavy side down".  That
> had
> not (but should have) occurred to me.
> -Bob
>
> Bob Sciamanda (W3NLV)
> Physics, Edinboro Univ of PA (em)
> trebor@velocity.net
> http://www.velocity.net/~trebor
> ----- Original Message -----
> From: "Chuck Britton" <britton@NCSSM.EDU>
> To: <PHYS-L@lists.nau.edu>
> Sent: Monday, December 02, 2002 4:32 PM
> Subject: Re: Loaded dice
>
>
> | Center of Mass - an often ignored concept in intro physics.
> |
> | When the die 'finds' itself up on an edge, the torques about that
> | edge are not balanced. The 'load' greatly favors a turn to C.M. low.
> |
> |
> |
> | At 4:16 PM -0500 12/2/02, Bob Sciamanda wrote:
> | >You read my consternation correctly, John.  Since all masses
> experience
> | >the same acceleration in a gravitational field, there must be some
> other
> | >reason for the heavier side to out-run the others.  With most
> objects I
> | >would look for differences in air resistance, because of shape.  Not
> | >applicable here.  I am left with a vague appeal to a tumbling
> phenomenon
> | >and am trying to remember applicable dteails of past studies of
> "rigid
> | >body motion".  The "tennis racket theorem" (only the words) just
> came
> to
> | >mind!  Please elucidate!
> | >-Bob
> | >
> | >Bob Sciamanda (W3NLV)
> | >Physics, Edinboro Univ of PA (em)
> | >trebor@velocity.net
> | >http://www.velocity.net/~trebor
> | >----- Original Message -----
> | >From: "John Mallinckrodt" <ajm@CSUPOMONA.EDU>
> | >To: <PHYS-L@lists.nau.edu>
> | >Sent: Monday, December 02, 2002 3:56 PM
> | >Subject: Re: Loaded dice
> | >
> | >
> | >| >Is it true that a dice is "loaded" by adding an internal weight
> near
> a
> | >| >given face.  Is this supposed to favor the dice falling with this
> face
> | >| >"down"?  Someone please explain(???)
> | >|
> | >| This would seem to me to be the case and it probably doesn't hurt
> if
> | >| the dice are of the "rounded edge" variety.  See, for instance,
> | >|
> | >|    http://www.halfpast.demon.co.uk/dd.html
> | >|
> | >| But why do I think you must have some sort of a theory to suggest
> | >| that this shouldn't work?  ;-)
> | >|
> | >| --
> | >| John Mallinckrodt        mailto:ajm@csupomona.edu
> | >| Cal Poly Pomona          http://www.csupomona.edu/~ajm