Date: Wed, 06 Oct 2004 06:54:59 GMT From: Malcolm William Mason <mwm1(delete)nospamedu> Subject: Re: Re: Re: Re: Re: Town And Country Miles
On Sat, 02 Oct 2004 18:24:13 GMT, amesnospamrak.demon.co.uk (Andrew Stephenson) wrote: >In article <3rdsl01oll2tuc3mm5pnaup4f05v0l98finospamcom> > mwm1(delete)nospamedu "delete" writes: > >> And, I am almost too embarrassed to ask but exactly what is a >> Newton in kilos or grams. [...] > >Not trying to tread on the other response, which gives numbers... > >IIRC, "newtons" often cause confusion in modern physics classes. >Formally, the SI unit "newton" is that force which, acting on a >mass of one kilogramme, causes it to accelerate by 1 metre/sec^2. > >Thus a lump of 1 kilo _mass_ (NB) on Earth exerts a _force_ (NB) >downward due to Earth's gravity of roughly 9.807 newtons. > IIRC, "newtons" often cause confusion in modern physics classes. Formally, the SI unit "newton" is that force which, acting on a mass of one kilogramme, causes it to accelerate by 1 metre/sec^2. Just like a good old dyne only very much bigger. one dyne accelerates one gram one cm. per secnd per second. And that is from a loooooong time ago! Thus a lump of 1 kilo _mass_ (NB) on Earth exerts a _force_ (NB) downward due to Earth's gravity of roughly 9.807 newtons. But weighs one kilo (kilogram) correct? And is Newton not capitalized as in Sir Isaac? Physicists and designers of machinery prefer to be very careful when saying words such as "kilo", "newton", "mass" and "force". And weight.? Blokes heaving on spanners here on Earth can get by with saying that 1 newton of force == 1 kilo of force. Malcolm Mason
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