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From: Radey Shouman <shouman@comcast.net>
Newsgroups: rec.bicycles.tech
Subject: Re: fast tires
Date: Wed, 18 Jun 2025 11:15:34 -0400
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Frank Krygowski <frkrygow@sbcglobal.net> writes:

> On 6/17/2025 3:40 PM, Zen Cycle wrote:
>>  Hey, we could be measuring in Slugs....
>> http://hyperphysics.phy-astr.gsu.edu/hbase/Mechanics/slug.html
>
> Yep, that unit of mass is part of the charmingly agricultural U.S. or
> British system of units.
>
> For the insufficiently educated: Weight is not the same thing as
> mass. They really should have different units. Failure to recognize
> that "pounds" refers to weight instead of mass can easily lead to a
> calculated answer that's off by a factor of more than 32.

Real users of Mickey mouse units for engineering calculations normally
use "pounds mass" and "pounds force", but I'm sure you know that.  The
slug as a unit of mass makes sense but I have never seen it actually
used.

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