- #1
sweet springs
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Bridge fall paradox
Another thread urges me to think of stress in materials in TOR and let me make a "paradox" to think of it as follows.
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A train is running on a bridge over a wide river. Evil terrorists switch on the bombs set on legs of the bridge to crash whole the bridge into dust in a moment. Train falls on the river and gets damaged. Fortunately all the passengers and the crews have already jumped out before the train comes to the bridge with no injury at all. Before inspection of the damaged train, two inspecters say,
A: Train is damaged homogeneously. Terrorists set the bombs to explode simultaneously, so the train fell keeping horizontal position. Every bottom of the train hit the water surface similarly.
B: The front part of the train is the most damaged. In train system bombs explode not simultaneously. The header, the earlier. The train did not keep horizontal position. Its front is downer. The front is the first part to hit water surface, so it is most heavily damaged.
Which is right?
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The answer is homogeneous damage. The train behaves like spaghetti, even if how rigid it is, in the train system.
I am glad if you would have some fun.
Another thread urges me to think of stress in materials in TOR and let me make a "paradox" to think of it as follows.
---------------
A train is running on a bridge over a wide river. Evil terrorists switch on the bombs set on legs of the bridge to crash whole the bridge into dust in a moment. Train falls on the river and gets damaged. Fortunately all the passengers and the crews have already jumped out before the train comes to the bridge with no injury at all. Before inspection of the damaged train, two inspecters say,
A: Train is damaged homogeneously. Terrorists set the bombs to explode simultaneously, so the train fell keeping horizontal position. Every bottom of the train hit the water surface similarly.
B: The front part of the train is the most damaged. In train system bombs explode not simultaneously. The header, the earlier. The train did not keep horizontal position. Its front is downer. The front is the first part to hit water surface, so it is most heavily damaged.
Which is right?
-----------------
The answer is homogeneous damage. The train behaves like spaghetti, even if how rigid it is, in the train system.
I am glad if you would have some fun.
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