if a dog walks across a suspension bridge. the gallop in it's step can collapse the bridge. not bridges of today. i have a hard time with this one but have heard it from three people.
2006-09-10 15:32:34 · 13 answers · asked by nakita 6 in Pets ➔ Dogs
Heavy dog, rickety bridge... it makes no difference. The rythm of the dog's trot is what destroys the mega-ton structure. In the past engineers were less aware of how harmonic vibrations could effect their constructions. If the bridge is supported at points along its axis that would allow such a self supporting vibration to occur it would increase in amplitude to the point of destroying the bridge. Now this would take a long time and there really isn't any practical way that the dog could do this in reality. But mathematically and in theory it is possible. You may have a science teacher favorite among educational videos that shows a bridge waving wildly from side to side and eventually collapsing. This was caused by the wind and harmonic vibrations. The bridge shook itself to pieces. This phenomon is possible with any structure in which you can get to vibrate, just find the right frequency and soon it will fall to pieces.
So, yes the rythmic forces applied to the bridge by the dog's feet could destroy the bridge, but this would not happen in real life.
Modern bridges, by the way are designed not to support harmonic vibrations by placing the supports are different intervals.
2006-09-10 15:50:11 · answer #1 · answered by Dr. Physics 1 · 2⤊ 2⤋
Ummmmm... no... but I can guess where this idea came from? Military personel marching in step CAN colapse a bridge, suspention or other... for this reason, all military personel break their step formation when crossing a bridge. A single dog could never colapse a bridge (maybe if it was made of thin paper?) It is the force of 1,000 troops all stepping at the exact same time which can cause damage to the structure of a bridge...
2006-09-10 22:53:22 · answer #2 · answered by tripforyou 5 · 1⤊ 1⤋
Yes Dogs knock down Suspension bridges on a daily basis.. Dont you read the paper ? SHEESH !!!
I make it a habbit never go over any bridges when walking my dog. I mean who wants to take that chance right?
2006-09-10 22:39:54 · answer #3 · answered by kathygd1 2 · 1⤊ 0⤋
Utter nonsense. A dog wouldn't be able to exert enough force to affect the bridge in any way.
2006-09-10 22:37:01 · answer #4 · answered by Chasiufan 4 · 1⤊ 0⤋
When soldiers go on marches, they are required to change their gait when crossing a bridge-- if every one is in step, they can set up an increasing oscillation that can amplify and cause a failure.
Can a dog do this? NO
2006-09-10 22:45:31 · answer #5 · answered by williamh772 5 · 0⤊ 1⤋
i think it is false.
unless it is a very old rickety bridge, that is holding up by a couple pieces of wood
2006-09-10 22:36:06 · answer #6 · answered by kag6667 2 · 0⤊ 1⤋
consider the source of the information
2006-09-10 22:37:53 · answer #7 · answered by basque girl 4 · 1⤊ 0⤋
Don't think I believe that one. Sounds way out there.
2006-09-10 22:59:17 · answer #8 · answered by Anonymous · 0⤊ 1⤋
lol a lie... unless the dog is like a 10M lbs dog.
2006-09-10 23:18:54 · answer #9 · answered by Kitty 3 · 0⤊ 1⤋
Don't believe everything you hear.
2006-09-11 05:58:50 · answer #10 · answered by jean 4 · 0⤊ 0⤋