Subject:
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Re: baffled by a part in RIS 1.5
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Thu, 5 Apr 2001 11:41:10 GMT
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Viewed:
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3667 times
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"Constantine Hannaher" <constantine.hannaher@hooshome.com> writes:
>
> Looking more closely in my Guide for the Use of the International System of
> Units (SI), NIST Special Publication 811 (from the United States National
> Institute of Standards and Technology) which sould be available as a PDF from
> their site www.nist.gov I see that while the newton is a special named unit for
> the derived quantity force, the newton meter is an expression of the special
> named unit joule with symbol J for the derived quantities of energy, work, and
> quantity of heat. Hmm. Imagine if LEGO had written cJ on the clutch gear.
Using a unit of energy for torque would be very strange.
You get an energy if you turn s.th. against a torque through
some angle (expressed in radians, I think).
Angles have no unit (or just 1),
hence the units of torque and energy are equal.
Nevertheless, torque and energy are different concepts.
Jürgen
--
Jürgen Stuber <stuber@loria.fr>
http://www.loria.fr/~stuber/
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Message has 1 Reply:
Message is in Reply To:
 | | Re: baffled by a part in RIS 1.5
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| Don't punish yourself! At least you rendered the symbols from the gear correctly. There are at least four errors in the message I was responding to: (1) confusing the prefix n for nano with the unit symbol N for newton; (2) attaching two prefixes (...) (25 years ago, 4-Apr-01, to lugnet.robotics.rcx)
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