FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups 
 ProfileProfile   PreferencesPreferences   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Forum index » Science and Technology » Math » Recreational
Domino Fall Speed
Post new topic   Reply to topic Page 1 of 1 [5 Posts] View previous topic :: View next topic
Author Message
--CELKO--
science forum beginner


Joined: 04 May 2005
Posts: 23

PostPosted: Wed Jun 28, 2006 1:42 pm    Post subject: Re: Domino Fall Speed Reply with quote

Quote:
Surely someone has considered and solved this problem long ago, but where can one find a discussion of this intriguing puzzle?

THE GEAT FALLING DOMINO BOOK by Bob Speca 1979, ISBN 0-446-97046-8 is
a history of the guy who did this stuff on telvision shows for a few
years to get it the world records and raise money for charity

DOMINOES -67 GAMES & TRCIKS by Malcolm A. Bryant, 1982, ISBN
0-8306-1308-0 has a lot of details for arrangements based onthe ratios
of the tiles.

There was also a piece in Scientific American on this subject by Jeral
Walker.

Quote:
From http://www.cincinnati.com/freetime/strange/091602_strange.html and
the "Strange but True" column:


Q. When dominoes are set up in a row and then toppled in chain
reaction, how fast does the wave move? How big can the last domino be,
felled by the small initial push?

A: University students in the Netherlands toppled 1.4 million dominos,
says Robert Banks in "Towing Icebergs, Falling Dominoes, & Other
Adventures in Applied Math." Had these all been arranged in a single
row, and spaced maybe 2 cm apart, totaling 28 km, wave speed would have
been around 3 km/hr during the approximately 10 hours of toppling time.

Now take this setup one better by introducing a multiplier factor,
where each successive domino is, say, 1.414 times larger than the
preceding domino, details Jearl Walker in "Scientific American." Walker
(crediting Lorne A. Whitehead) started with an acrylic domino so small
he "could hardly stand it upright," then progressed until the 13th
domino was so heavy he had "difficulty lifting it into place." Still,
the chain reaction initiated by the tiny first domino dropped the end
one, which was 64 times higher and 262,144 times heavier, and with
potential energy almost 17 million times greater!

Make the chain even longer and the sky might be the limit, with
end-line dominoes hardly moveable by mortal men.

The hardcore math is at:

http://www.lorentz.leidenuniv.nl/~jmjvanl/domino.pdf
Back to top
jasen
science forum beginner


Joined: 28 Jun 2006
Posts: 16

PostPosted: Wed Jun 28, 2006 11:38 am    Post subject: Re: Domino Fall Speed Reply with quote

On 2006-06-28, Duram <danur@> wrote:
Quote:

What is the domino fall speed?

depends on size etc... plug innertia figures into kinematic formulae for
exact result.

Quote:
How to figure knowing the domino size and the distance between them?

ah topple-propogation speed, probably easiest to do tests

iirc wider spacing propagates slightly slower

Quote:
Is there any site about domino fall path construction, size records,
number of pieces records and other info´s?

Guiness book of records would be a start.
google would bee another.




--

Bye.
Jasen
Back to top
Mark Spahn
science forum addict


Joined: 07 Jul 2005
Posts: 62

PostPosted: Wed Jun 28, 2006 4:26 am    Post subject: Re: Domino Fall Speed Reply with quote

Come to think of it, this is an interesting question, although poorly
expressed. (What does "domino fall speed" mean?)
Let me try to restate the problem:
Given a straight row of dominoes, when you cause the first domino
in the row to topple, striking the next domino, which hits the next,
and so on, what determines the speed at which the wavefront of
toppling dominoes travels?
Can you vary this speed by changing the spacing between the dominoes,
the dimensions of the dominoes, the density (weight) of the dominoes,
the force with which the first domino is push over?
With standard-size and -weight dominoes, is this speed a constant?
If so, how many miles per hour is it?
Surely someone has considered and solved this problem long ago,
but where can one find a discussion of this intriguing puzzle?

-- Mark Spahn

"Patrick Hamlyn" <path@multipro.N_OcomSP_AM.au> wrote in message
news:69n3a2l3h6hg0ah1s3a5ahtno6q5tv66vn@4ax.com...
"Duram" <danur@@ig.com.br> wrote:

Quote:

What is the domino fall speed?
How to figure knowing the domino size and the distance between them?
Is there any site about domino fall path construction, size records,
number of pieces records and other info´s?

I recommend dropping the domino in a large tub of water. The fall speed will
then be easily measured with a stopwatch.
Back to top
Patrick Hamlyn
science forum beginner


Joined: 03 May 2005
Posts: 45

PostPosted: Wed Jun 28, 2006 1:37 am    Post subject: Re: Domino Fall Speed Reply with quote

"Duram" <danur@@ig.com.br> wrote:

Quote:

What is the domino fall speed?
How to figure knowing the domino size and the distance between them?
Is there any site about domino fall path construction, size records,
number of pieces records and other info´s?

I recommend dropping the domino in a large tub of water. The fall speed will
then be easily measured with a stopwatch.
Back to top
Duram
science forum beginner


Joined: 28 Jun 2006
Posts: 1

PostPosted: Wed Jun 28, 2006 12:13 am    Post subject: Domino Fall Speed Reply with quote

What is the domino fall speed?
How to figure knowing the domino size and the distance between them?
Is there any site about domino fall path construction, size records,
number of pieces records and other info´s?
Back to top
Google

Back to top
Display posts from previous:   
Post new topic   Reply to topic Page 1 of 1 [5 Posts] View previous topic :: View next topic
The time now is Mon Oct 23, 2017 11:28 am | All times are GMT
Forum index » Science and Technology » Math » Recreational
Jump to:  

Similar Topics
Topic Author Forum Replies Last Post
No new posts Speed vs velocity. brian a m stuckless Electromagnetics 1 Tue Jul 11, 2006 12:30 pm
No new posts Speed of Arrow after 1 second AA Physics 4 Tue Jun 27, 2006 12:35 pm
No new posts Einstein, mind's voyage, speed of light and time glbrad01 Relativity 48 Sat Jun 24, 2006 10:30 am
No new posts Max bullet speed Dirk Bruere Research 3 Mon Jun 19, 2006 10:53 pm
No new posts EINSTEIN PROVES VARIABLE SPEED OF LIGHT Pentcho Valev Relativity 9 Wed Jun 14, 2006 6:21 am

Copyright © 2004-2005 DeniX Solutions SRL
Other DeniX Solutions sites: Electronics forum |  Medicine forum |  Unix/Linux blog |  Unix/Linux documentation |  Unix/Linux forums  |  send newsletters
 


Powered by phpBB © 2001, 2005 phpBB Group
[ Time: 0.0210s ][ Queries: 20 (0.0040s) ][ GZIP on - Debug on ]