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Title: Behold, the power of Tae Bo. Post by: Minvaren on July 19, 2011, 02:31:58 PM Link (http://news.blogs.cnn.com/2011/07/19/scientist-tae-bo-workout-sent-skyscraper-shaking/)
Quote Seventeen people performing a vigorous Tae Bo workout caused tremors that forced the evacuation of a South Korean skyscraper earlier this month, the building's owners say. Prime Group, owner of the 39-story TechnoMart commercial-residential high-rise in Seoul, said 17 middle-aged people were working out to the pop song "The Power" by Snap on July 5 when their movements set the upper floors of the tower shaking for 10 minutes, according to a report from the Korea JoongAng Daily. Bit surprised that it wasn't "Humpty Dance," but hey, whatever works... :awesome_for_real: Title: Re: Behold, the power of Tae Bo. Post by: Hawkbit on July 19, 2011, 04:17:39 PM Last words: "Aaahhh this skyscraper is going to collapse. It's gettin'... it's gettin'... it's gettin' kinda hectic."
It wasn't the Tae Bo, it was The Power. Title: Re: Behold, the power of Tae Bo. Post by: Strazos on July 19, 2011, 04:29:14 PM I don't buy that story - who still does Tae Bo? :why_so_serious:
Title: Re: Behold, the power of Tae Bo. Post by: Chimpy on July 19, 2011, 05:11:20 PM Bit surprised that it wasn't "Humpty Dance," but hey, whatever works... :awesome_for_real: The Humpty Dance wouldn't work because no two people will do it the same. Title: Re: Behold, the power of Tae Bo. Post by: Sky on July 20, 2011, 06:31:50 AM Wouldn't a harmonic resonance from the music be more likely?
Title: Re: Behold, the power of Tae Bo. Post by: Cyrrex on July 20, 2011, 08:10:30 AM Bit surprised that it wasn't "Humpty Dance," but hey, whatever works... :awesome_for_real: The Humpty Dance wouldn't work because no two people will do it the same. Well played, that had me rolling :awesome_for_real: Title: Re: Behold, the power of Tae Bo. Post by: Murgos on July 20, 2011, 08:16:11 AM Wouldn't a harmonic resonance from the music be more likely? Than a harmonic resonance from people moving in unison? Not necessarily. Title: Re: Behold, the power of Tae Bo. Post by: Morat20 on July 20, 2011, 08:33:36 AM Back to my favorite physics anecdote that I've never had officially verified -- Roman legionaires used to break step when crossing bridges, to avoid that exact problem. :)
Title: Re: Behold, the power of Tae Bo. Post by: Murgos on July 20, 2011, 09:28:56 AM Back to my favorite physics anecdote that I've never had officially verified -- Roman legionaires used to break step when crossing bridges, to avoid that exact problem. :) Break Step March is still a command in modern day drill. Title: Re: Behold, the power of Tae Bo. Post by: Merusk on July 20, 2011, 09:35:28 AM Mythbusters tried to disprove that one, but I have great issues with their contraption and methods used on that particular myth.
Tesla did HR tests, didn't he? I seem to recall that. This building, though, I'm just going to go with shitty construction. :grin: Title: Re: Behold, the power of Tae Bo. Post by: Morat20 on July 20, 2011, 10:18:35 AM Mythbusters tried to disprove that one, but I have great issues with their contraption and methods used on that particular myth. It's difficult to disprove. It's certainly physically possible -- resonance effects in bridges are well known (that Narrows bridge that collapsed under wind gusts is a famous example) -- the difficulty is since not all bridges are the same, and will thus be more susceptable to different resonances. Tesla did HR tests, didn't he? I seem to recall that. This building, though, I'm just going to go with shitty construction. :grin: So Romans marching across a bridge can collapse it if they're walking in perfect time. If the bridge is the proper size and construction. The odds of any given bridge collapsing are probably low, but without enough legions crossing enough bridges, some are going to fall. Title: Re: Behold, the power of Tae Bo. Post by: Chimpy on July 20, 2011, 08:19:29 PM Well played, that had me rolling :awesome_for_real: Did I ruin the image and the style you're used to? :grin: Title: Re: Behold, the power of Tae Bo. Post by: NowhereMan on July 21, 2011, 05:06:05 AM The London Millenium Bridge suffered from harmonic resonance simply from enough people happening to walk in step, which caused the bridge to wobble enough to cause more people to fall into the same step, which made the problem worse. Until they closed the bridge and fixed it.
I also know Albert bridge up near Battersea Park has (or had, they're renovating it) a sign telling troops crossing it to break step. Title: Re: Behold, the power of Tae Bo. Post by: Fordel on July 21, 2011, 02:30:33 PM Back to my favorite physics anecdote that I've never had officially verified -- Roman legionaires used to break step when crossing bridges, to avoid that exact problem. :) Break Step March is still a command in modern day drill. Yea, I remember as a little boy my father explaining that to me, when he was in the army, you would do that on bridges just for that reason. He used to also do that to tease me, since as a wee lad I would try to match his footsteps :heart: |