Re: [Phys-l] definitions ... purely operational, or not

[Peter Schoch <pschoch@nac.net>]

If m is in kilograms, then W = mg gives us weight in Newtons.

If m is in grams, then W = mg gives us weight in dynes.

Newtons is the SI accepted -- at least that's what I teach my students.

Peter Schoch
On Nov 7, 2010, at 9:05 AM, Robert Yeend wrote:

> As someone who grew up thinking of the slug as the unit of mass and  
> pound as the unit of weight, what, then, is the accepted unit of weight?
>
> Bob Yeend
>
> On Nov 7, 2010, at 5:34 AM, John Denker wrote:
>
> > Recall that the pound is
> > defined as a unit of mass according to US law, and always
> > has been.
>
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