Archimedes Challenge--Floating Bridge
Part2 (History):
A Floating Bridge, Is also known as a Pontoon Bridge. 1184BC, In Ancient
China, during Zhou dynasty, King Wen of Zhou invented the floating bridge. King
Wen of Zhou built this bridge in order to marry the woman he loved. And only the
nobilities and the royal families are allowed to use this bridge.
The Greek writer Herodotus in his Histories, records several pontoon
bridges. The Persian Emperor Darius used a 2 kilometers pontoon bridge to cross
the Bosphorus and Emperor Caligula built a 2 miles (3.2 km) bridge at Baiae in 37
AD. For Emperor Darius I The Great of Persia (522–485 BC), the Greek Mandrocles
of Samos once engineered a pontoon bridge that stretched across the Bosporus,
linking Asia to Europe, so that Darius could pursue the fleeing Scythians as well as
move his army into position in the Balkans to overwhelm Macedon.
This invent changed people’s transportation, and increased the transport
capacity, cross a river, using floating bridge will using less time than boat, and
floating bridge can load more cargo.
Ancient China (the old way to build floating bridge)
Floating Bridge built in modern days
Part3:
The physics involved in Floating bridge
To create a floating bridge, Archimedes principles must be used Fb=pVg
The road way is placed on top of water tight pontoons placed end to end. The
weight of the water displaced by the pontoons is equal to the weight of the
structure + the vehicles traveling on it. So the
bridge can be floating.
Part 4:
Day1
Divided the work. Luke and Keyan bring the materials we need for the model.
Eugene Doing the research on Floating Bridge. Mancy Working on the model’s
sketch.
Day2
Start working on the project. Understanding how it worked. And start doing the
sketch and design.
Day3
Finished the sketch of Floating Bridge. We decided put sponge under the wooden
board to increase the buoyancy.
Day4
Start working on the model.
Day5
Keep working on the model,
stick things together with glue
gun.
Day6
Working on the handrail on the
bridge. Got the model done at
the end of the class.
Day7
Start work on the responses.
Part5 (References):
1. https://en.wikipedia.org/wiki/Pontoon_bridge#Historic_uses
2. https://prezi.com/okpviqywultk/physics-behind-floating-bridges/
3. http://baike.baidu.com/link?url=1FOhqivFyvK6G3UhPEgmh4nOh2hskIga9H
CRem_7sJZ7DLQN00btVVNCr9jYXp0z5xANNpBSQE2jnbf4QaHmTq
4. http://it.mortemor.com/index.php/articles/indice/ponte-galleggianteregno-unito/
5. http://www.alamy.com/stock-photo/sampan.html
6. https://en.wikipedia.org/wiki/List_of_pontoon_bridges