[meteorite-list] Seems PF fell on 3/27 and NOT on 3/26...

From: Frank Prochaska <fprochas_at_meteoritecentral.com>
Date: Thu Apr 22 10:22:34 2004
Message-ID: <NDBBICFKNKHAAEEJLDALOEEEDJAA.fprochas_at_premier1.net>

The force of acceleration (gravity) is 32 ft/sec/sec, and terminal velocity
is reached when the force of acceleration (down) is balanced by the force of
resistance (up), and the object ceases to accelerated and continues down at
constant velocity. The force of resistance will change as the object
decends to denser layers of the atmosphere, and would imagine it depends on
the size of the object (aerodynamic cross section vs. volume and mass),
might depend a little on shape, might depend on whether the object is
oriented or rotating, probably depends on factors that would affect
turbulence around the object, etc. I doubt "terminal" velocity is the same
for the large pieces and the smaller ones. It's not as simple as dropping a
big rock and a little rock from a tower for example. Does anyone know of a
measurement of terminal velocity from any fall, catching one on radar or
something?

Frank Prochaska




-----Original Message-----
From: meteorite-list-admin_at_meteoritecentral.com
[mailto:meteorite-list-admin_at_meteoritecentral.com]On Behalf Of curch
Sent: Friday, June 06, 2003 9:57 AM
To: Meteorite-list_at_meteoritecentral.com
Subject: RE: [meteorite-list] Seems PF fell on 3/27 and NOT on 3/26...


the ACCELERATION is 32 feet/sec/sec. that means that while in free fall
(upper atmosphere only), it increases its velocity by 32 ft/sec EACH sec. (i
teach physics - couldn't let that one go!).

cheers,

john

p.s. does anyone know how to access the archives with out generating a
'program failure' and having to close down the website window??? a settings
problem? thanks.

-----Original Message-----
From: meteorite-list-admin_at_meteoritecentral.com
[mailto:meteorite-list-admin_at_meteoritecentral.com]On Behalf Of
CMcdon0923_at_aol.com
Sent: Friday, June 06, 2003 8:40 AM
To: MeteorHntr_at_aol.com; meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] Seems PF fell on 3/27 and NOT on 3/26...


<<At a terminal velocity of 32 feet per second, that would be <<1,980
seconds of falling or 33 minutes of falling.

TV is more than 32 fps....that equates to only about 22MPH.

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Received on Fri 06 Jun 2003 11:11:54 AM PDT