leaning tower of pisa,,?
1)why doesnt the leaning tower of pisa fall?
- william vLv 51 decade agoFavorite Answer
Don`t worry Norman, someone will ask again!!!!
- 1 decade ago
The leaning tower is basically a cylinder - like a straight sided glass. Try an experiment using a plastic "glass" tumbler. Put a book on a counter top and put the glass on the book. Now lift one edge of the book and see how far you can tilt the glass before it falls over. You will be surprised. The glass's center of gravity (balance point) has to be outside its base before it will fall over. OK, some physics geek is going to say, "Yeah, but the glass isn't solid. It has more empty space than the leaning tower." True, but you get the idea anyway. Of course, if the tower leans too much more it will fall which is why engineers are trying to stop it from leaning further.
- Anonymous1 decade ago
I thought I answered this before.. but anyway.. the leaning tower kof Pisa would have fallen years ago if it had not been for the efforts of engineers to radically build in supports to keep it from falling any more.. Of course the Italians want to keep the tower leaning as it is a major tourist attraction but supposedly the engineers have fixed the problem of its leaning
- Anonymous5 years ago
The tower is famous for its noticeable lean. It was intended to stand vertically, to serve as a bell tower, but began leaning soon after construction started in 1173. After the third floor was built in 1178, the tower acquired a lean, due to a mere three-meter foundation in weak, unstable subsoil. The design of this tower was flawed from the beginning. Construction was halted for almost 100 years because the Pisans were almost continually engaged in battles with Genoa, Lucca and Florence. This allowed for the underlying soil to settle, otherwise the tower would almost certainly have toppled. In 1198 some clocks were temporarily installed on the unfinished construction. In 1838 the architect Alessandro Della Gherardesca excavated a walkway around the tower to make the base of the tower visible again. This caused a flooding of the base and again an increase in the inclination. Benito Mussolini ordered the tower be returned to a vertical position, so concrete was poured into its foundation. The results were unexpected and sank the tower further into the soft soil. On February 27, 1964, the government of Italy requested aid in preventing the tower from toppling. A multinational task force of engineers, mathematicians and historians was assigned and met on the Azores islands to discuss stabilization methods. After over two decades of work on the subject, the tower was closed to the public in January 1990. In the time that the tower was closed the bells were removed to relieve some weight and cables were cinched around the third level and anchored several hundred meters away. Apartments and houses in the path of the tower were vacated for safety concerns. After a decade of corrective reconstruction and stabilization efforts the tower was reopened to the public on December 15, 2001. Many methods were proposed to stabilize the tower including the addition of 800 metric tons of lead counterweights to the raised end of the base. The final solution to correcting the lean was to remove 38 m3 of soil from underneath the raised end. The tower has been declared stable for at least another 300 years.
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- Angry manLv 61 decade ago
Because it has been strengthened to stay like that, at least for around a 100 years I think, but it is always under surveillance
- quatrapillerLv 61 decade ago
It hasn't lost its center of gravity yet . . . and no one has pushed hard enough.