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Re: [Phys-l] Why soldiers break step on small bridges, and not so small.




On 2011, Jul 26, , at 20:53, William Robertson wrote:

They used reasonably solid bridges and small
robot "soldiers" for their test.


REVISITED: Soldiers marching in unison can cause harmonic oscillation in a bridge and cause it to collapse. (From Episode 12)
PLAUSIBLE
The first time the myth was tested, the miniature bridge was flawed enough in its design to get an inconclusive answer, but with this test, just testing the natural resonant frequency of a simple wooden bridge, resulted in a plausible conclusion, but it is very improbable.

(This myth was retested for this episode but it ultimately did not air.)


http://mythbustersresults.com/episode14

bc, miniature bridge?!!!!