Re: timing data for falling objects

[Ludwik Kowalski <kowalskiL@MAIL.MONTCLAIR.EDU>]

Another way of getting about 2 seconds of data is to
use the motion detector. Throw a large ball vertically
so that it goes up 5 meters and then down. A tennis
ball is too small for this; use the basket ball instead.
The motion detector can be on the floor (looking up),
or near the sealing (looking down). To protect the
detector on the floor (from the returning ball) I used
an iron Bunsen burner stand. Its hole is large enough
for the detector and small enough for the ball.
Ludwik Kowalski

Joseph Bellina wrote:

> some time ago Carl Adler at Eastern Carolina filmed a replica of the
> imagined Galileo on the leaning tower experiment.  If you had a copy,
> you could extract time and position data from it...of course you could
> just make your own video.
>
> cheers
>
> On Fri, 5 Jul 2002, Robert Cohen wrote:
>
> > Oops - Here is a more specific request: Does anyone have timing data for an
> > object (like a ball or human), released from rest within a kilometer of the
> > earth's surface, falling over several seconds (as opposed to just a second
> > or so)?
> >
> > ____________________________________________
> > Robert Cohen; rcohen@po-box.esu.edu; 570-422-3428; http://www.esu.edu/~bbq
> > Physics, East Stroudsburg Univ., E. Stroudsburg, PA 18301
> >
> > > -----Original Message-----
> > > From: John S. Denker [mailto:jsd@MONMOUTH.COM]
> > > Sent: Friday, July 05, 2002 4:38 PM
> > > To: PHYS-L@lists.nau.edu
> > > Subject: Re: timing data for falling objects
> > >
> > >
> > > Robert Cohen wrote:
> > > > Does anyone have timing data for an object falling over
> > > several seconds (as
> > > > opposed to just a second or so)?  I'm looking for actual
> > > data rather than
> > > > theory.
> > >
> > > I suspect this isn't the desired answer, but:   The
> > > moon is undergoing free-fall, and accurate timing data
> > > has been collected for nearly a billion seconds.
> > >
> > > http://sunearth.gsfc.nasa.gov/eclipse/SEhelp/ApolloLaser.html
> > >
> > > ===========
> > >
> > > Perhaps more useful:
> > > Do a search on "exterior ballistics" e.g.
> > >  http://www.google.com/search?q=exterior+ballistics+table+time
> > >  http://www.google.com/search?q=ingalls+ballistic+tables
>
> Joseph J. Bellina, Jr.               219-284-4662
> Associate Professor of Physics
> Saint Mary's College
> Notre Dame, IN 46556