Re: pinhole pounds

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From: marc crown (mcrown@gwhs.org)
Date: Wed Nov 19 2003 - 20:24:29 PST 

Date: Wed, 19 Nov 2003 20:24:29 -0800
Subject: Re: pinhole pounds
From: marc crown <mcrown@gwhs.org>
Message-Id: <6EFC169A-1B11-11D8-B5CF-000393DCEEB8@gwhs.org>

pounds/ounces/tons etc. like their SI counterparts are actually units
of mass but are often used to describe weight since gravity is
basically constant anywhere on the earth. The unit for weight is the
Newton (m x g). Since mass is constant the old adage remains true but
with an addendum. "a pound is a pound the world around" including the
moon.

I'm not sure what the value of a pound note is on the moon but I'm sure
it would buy a lot of cheese.
marc

On Wednesday, November 19, 2003, at 08:00 PM, jessica wrote:

> One of my students was asking whether pounds was weight or mass. ie
> Will the pounds of an object change on the moon? I thought that
> pounds was mass not weight, so we are checking.
> Jessica
>
>
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