Re: [Phys-l] Coriolis effect puzzlement

["Bob Sciamanda" <treborsci@verizon.net>]

Exactly!

Apropos,
Some time ago I posted two IP simulations of a circular body on the end of a 
rod which rotated about the rod’s fixed remote end.  In the first simulation 
the circular body was rigidly fixed to the rod.  In the second the circular 
body was free to rotate,without friction, about its CG, which was fixed to 
the rod end.

In the first simulation the circular body had a spin rate equal to the rod’s 
revolution rate. In the second simulation the circular body maintained its 
orientation in space and had NO spin as it revolved with the rod.

To emphasize the differences, the action could be viewed from space, from 
the reference frame of the rotating rod, or from the reference frame of the 
circular body.

From: John Mallinckrodt
Sent: Thursday, December 08, 2011 6:12 PM
To: Forum for Physics Educators
Subject: Re: [Phys-l] Coriolis effect puzzlement
I don't think anybody else has commented specifically on this yet so I just 
wanted to say that I think it is a really nice demo.  As Robert (and others) 
mentioned early on, it can help make clear that Hurricanes do not "depend" 
on the Coriolis effect and are much more easily understood as simple 
manifestations of the conservation of angular momentum.

John Mallinckrodt
Cal Poly Pomona

On Dec 6, 2011, at 12:49 PM, Robert Cohen wrote:

> On 2011, Dec 02, , at 10:25, I wrote:
>
> > P.S. I once made a video of myself seated on a portable rotating
> > platform that was, in turn, placed near the edge of one of those
> > playground rotating platforms.  I placed a video camera at the other
> > end and taped myself as I brought my hands in toward my body and away.
>
> To which Bernard Cleyet responded:
>
> > Done, but where's the video?
>
> My previous videos were all done on VHS, so I went out this past weekend
> and made a .wmv recording and tried to post it on YouTube.  This is my
> first attempt at posting on YouTube so I don't know if it worked but if
> it did you can watch the video at the following link:
>
> <http://www.youtube.com/watch?v=_wTH6-GaYjE&list=HL1323203881&feature=mh
> _lolz>
>
> Robert A. Cohen, Department of Physics, East Stroudsburg University
> 570.422.3428   rcohen@esu.edu    http://www.esu.edu/~bbq
> _______________________________________________
> Forum for Physics Educators
> Phys-l@carnot.physics.buffalo.edu
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Bob Sciamanda
Physics, Edinboro Univ of PA (Em)
treborsci@verizon.net
http://mysite.verizon.net/res12merh/