1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Domino experiment

  1. Sep 9, 2006 #1
    I made such experiment: I calculated the time dependence on the number of dominoes. The dominoes are set up in a row with a constant distance between them.

    However the measurements are not necessarily exact and that is why I have a question:

    What should be the relation between the number of dominoes set up in a row and the time that takes them to be demolished after I push the first one.
  2. jcsd
  3. Sep 10, 2006 #2
    hmmm......i got a feeling that rotational inertia also needs to be taken into account, since the domino is rotating(sort of).
  4. May 2, 2007 #3
    A similar question has stymied me for quite some time; that being, for a given domino shape/size/weight, is there an optimal spacing that will produce the fastest wave propagation?
  5. May 3, 2007 #4
    I would think it's a little predictable to some extent, since the only forces on a domino are its inital impulse plus gravity. When dominos are spaced farther apart, they hit the next domino with a greater linear impulse but transmit a smaller angular momentum (because it hits the domino at a point closer to the center of mass -- less r). On the other hand, closer dominos transmit more angular momentum per linear impulse, but the impulse is less because it has had less time to accelerate. Interesting question, and I bet there is a "best-case" solution for a standard size/weight domino that would take a few iterations to solve. When I have a little time to think about it more I'll respond again...
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Domino experiment Date
Domino Force Nov 25, 2014
Energy of Falling Dominoes - Rotational and Gravitational Jun 17, 2011
Some experiments on dominos Mar 12, 2011
Domino drop graph? Mar 29, 2010
Stacking Dominos Jun 11, 2009