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Re: [Phys-L] inertia and the tablecloth demo



I consider mass and inertia to be the same thing. Inertia is the word one tends to use when one is talking about the concept and mass is the word one tends to use when one wants to assign a value to it. It is often said that "Mass is a measure of inertia." (That phrase, in quotes, gets 65,100 hits on Google.) I prefer "Mass is inertia." which only gets 18,200 hits.

-----Original Message-----
From: Phys-l [mailto:phys-l-bounces@www.phys-l.org] On Behalf Of
LaMontagne, Bob
Sent: Thursday, August 18, 2016 11:49 AM
To: Phys-L@Phys-L.org
Subject: Re: [Phys-L] inertia and the tablecloth demo

I always thought of inertia as a concept. Mass is how it is embodied in
Newton's 2nd Law (And Newton's gravitational law).

Bob at PC

________________________________________
From: Phys-l <phys-l-bounces@www.phys-l.org> on behalf of Daniel
MacIsaac <danmacisaac@gmail.com>
Sent: Thursday, August 18, 2016 11:30 AM
To: Phys-L@Phys-L.org
Subject: Re: [Phys-L] inertia and the tablecloth demo

On Aug 17, 2016, at 7:12 PM, Bernard Cleyet <bernard@cleyet.org> wrote:

Now I am confused: I thought inertia was synonymous w/ mass.


bc
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Moi aussi. Inertia units are kg etc and dimensions are those of mass.

Synonymous at least until one gets to inertial mass vs gravitational mass…

I’m always happy to learn otherwise,

Dan MacIsaac, Associate Professor of Physics, SUNY-Buffalo State College
SAMC278, 1300 Elmwood Ave, Buffalo NY 14222 USA 1-716-878-3802
<macisadl@buffalostate.edu> <http://PhysicsEd.BuffaloState.edu>
Physics Graduate Coordinator & NSF Investigator for ISEP (MSP) and Noyce


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