Re: How far does an object fall during the first half second after it's released?

From: Richard Henry (rphenry_at_home.com)
Date: 07/02/04 

Date: Fri, 2 Jul 2004 15:32:00 -0700

"Gene Nygaard" <gnygaard@nccray.com> wrote in message
news:g39be01bfq6v1nli0bf1d0a857l8t4fc1r@4ax.com...
> On Fri, 02 Jul 2004 13:02:21 GMT, Sam Wormley <swormley1@mchsi.com>
> wrote:
>
> >"Donald G. Shead" wrote:
> >>
> >> "Richard Henry" <rphenry@home.com> wrote in message
news:<HTZEc.6180$151.4316@fed1read02>...
> >> > "Donald G. Shead" <dcshead@charter.net> wrote
> >> Cut<
> >> > >
> >> > > Virtually all good weight-scales, _if set to zero when empty_; in
the
> >> > > controled environment of a laboratory: Whether at the equator or
the
> >> > > poles will register the same weight for any item!
> >> >
> >> > No they don't.
> >>
> >> Will you please tell me why they don't.
> >
> > w = mg
> >
> > g has different values at different altitudes and different locations
> > on the Earth at the same altitude. This is a problem for spring scales.
>
> Big deal. You are adding additional specifications, narrowly
> restricting the type of scales you are talking about.
>
> So "No, they don't" should not be changed to "Yes, they do" but rather
> to "Sometimes they do, and sometimes they don't."

Really? With which of these statements do you disagree:

1. The original statement described "weight-scales".

2. Weight = mass times g, the local gravitational acceleration.

3. g varies over the surface of the Earth, especially at "the equator or
the poles", as in the original statement.

4. Weight varies over the surface of the Earth, especially at "the equator
or the poles", as in the original statement.

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