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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Wed, 4 Apr 2001 15:16:27 GMT
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Viewed:
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1269 times
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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 nano and centi to a single unit meter;
(3) asserting that a unit of length (meter) might be a measurement of force;
(4) capitalizing the prefix symbol c for centi and the unit symbol m for meter.
One does not have to be a metric fussbudget to see how careful rendering of the
symbology is necessary.
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.
In lugnet.robotics.rcx, Dave Mee writes:
>
> "Constantine Hannaher" <constantine.hannaher@hooshome.com> wrote in message
> news:GB7xrE.KJ3@lugnet.com...
> > N.cm = newton.centimeter
>
> Whoah! Thanks for the insights everybody!
>
> N.cm? This stuff is meant to be used by 12 year old kids? 27 year old kid
> hangs his head in shame. :-)
>
> Dave
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Message has 1 Reply:
 | | Re: baffled by a part in RIS 1.5
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| (...) 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. (...) (23 years ago, 5-Apr-01, to lugnet.robotics.rcx)
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Message is in Reply To:
| | Re: baffled by a part in RIS 1.5
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| "Constantine Hannaher" <constantine.hannahe...shome.com> wrote in message news:GB7xrE.KJ3@lugnet.com... (...) Whoah! Thanks for the insights everybody! N.cm? This stuff is meant to be used by 12 year old kids? 27 year old kid hangs his head in (...) (23 years ago, 3-Apr-01, to lugnet.robotics.rcx)
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