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RE: Slug v. lb-mass

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Roger:

Your answer is only partially correct.  The relationship of interest
is W=mg.  Using U.S. Customary units, g = 32.174... ft/sec/sec, W is
in pounds, and m is in slugs.  So yes,

   "1 slug = (approx.) weight in lbs/32.2"

However, one pound (force) corresponds directly to one lb-mass.  [In
the same (wrong) way that some countries use kilograms force = force
exerted on one kilogram of mass at the earth's surface.]  Therefore,

1 slug = 32.174... lb-mass

-Mike

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Michael Valley, P.E., S.E.                   E-mail: mtv(--nospam--at)skilling.com
Skilling Ward Magnusson Barkshire Inc.              Tel:(206)292-1200
1301 Fifth Ave, #3200,  Seattle  WA 98101-2699      Fax:        -1201

-----Original Message-----
From: Roger Turk [mailto:73527.1356(--nospam--at)compuserve.com]
Sent: Wednesday, April 04, 2001 9:03 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Slug v. lb-mass


1 slug = 1 lb-mass = (approx.) weight in lbs/32.2

HTH

A. Roger Turk, P.E.(Structural)
Tucson, Arizona

Scott C. Bernard asked:

. > Can someone explain the difference between a slug and a lb-mass?
I was
. > always under the impression that a slug was the British unit for
mass and
. > now I see lb-mass used.