Re: [Phys-l] nifty pendulum, conservation, et cetera

["Bob LaMontagne" <rlamont@postoffice.providence.edu>]

A marble in the bowel? That had to hurt :-)

I don't mean to hijack this thread, but I remember the old Physical Science
text by Holton making a big distinction between N1 and Galileo's Law of
Inertia. As I remember, Galileo claimed that as long as a rolling object did
not change it's distance from the center of the Earth it would not speed up
or slow down. N1 applies to true straight line motion.

Unfortunately, I have lost my copy of Holton over the years - but when
Physical Science was in favor it was my favorite text.

Bob at PC

> -----Original Message-----
> From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-
> bounces@carnot.physics.buffalo.edu] On Behalf Of Bernard Cleyet
> Sent: Wednesday, May 31, 2006 10:56 PM
> To: Forum for Physics Educators
> Subject: Re: [Phys-l] nifty pendulum, conservation, et cetera
>
> Didn't he try a "marble" ina bowel first?
>
> bc, who objects to the "nearly-lossless" phrase, and calls N's 1st,
> Galileo's law.
>
> p.s. A UCSC faculty member, ca. 1986, requested one of these.   Re: JD's
> observation #2;  I think T.S. Kuhn explains some of this.
>
> John Denker wrote: