14. Falling Tower

“Identical discs are stacked one on top of another to form a freestanding tower. The bottom disc can be removed by applying a sudden horizontal force such that the rest of the tower will drop down onto the surface and the tower remains standing. Investigate the phenomenon and determine the conditions that allow the tower to remain standing.”


I. Phenomenon Demonstration

  • Tablecloth Trick – Cool Science Experiment, (YouTube, SpanglerScienceTV, Dec 16, 2011),

  • Tablecloth Tricks! (Dear Ryan), (YouTube, nigahiga, Mar 29, 2019), (Check out 05:42, although the rest of the video is very amusing)


II. Books, Encyclopedia, Discussion and Forum Posts

III. Research Papers