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Master's Dissertation
DOI
10.11606/D.54.1981.tde-16102009-102123
Document
Author
Full name
Roberto Hessel
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1981
Supervisor
Committee
Schiel, Dietrich (President)
Ferreira, Guilherme Fontes Leal
Hamburger, Ernst Wolfgang
Title in Portuguese
Discos sustentados por colchão de ar: uma nova proposta.
Keywords in Portuguese
Colchão de ar
Discos sustentados por colchão de ar
Lubrificação a ar
Registro de trajetória
Abstract in Portuguese
Os discos sustentados por colchão de ar têm encontrado larga aplicação didática. Sua utilização, contudo, esbarra em algumas dificuldades, pois os sistemas convencionais que permitem registrar as trajetórias dos discos e fornecer o gás para sustentá-los tornam difícil e dispendioso o seu emprego. Neste trabalho mostra-se como essas dificuldades podem ser superadas, utilizando idéias diferentes daquelas que vêm sendo seguidas tradicionalmente. Três novos discos sustentados por colchão de ar são estudados. Um deles leva um reservatório de ar consigo e dispõe de um circuito eletrônico acoplado a um sistema eletromecânico que permite registrar fácil e economicamente a trajetória do disco. Os outros dois dispõem de uma bomba de ar solidária a eles e de um sistema eletromecânico semelhante ao do primeiro modelo. Experiências realizadas com as três versões construídas são também apresentadas e analisadas.
Title in English
Air-supported pucks: a new proposal.
Keywords in English
Air mattress
Air-supported pucks
Gas film lubrification
Record of trajectory
Abstract in English
There are many applications of air-suspended pucks in physics teaching. However, there are some difficulties in their widespread utilization, particularly in their maintenance and handling, because of the high cost of the conventional systems of recording the trajectories and supplying the gas needed to support the pucks. In this paper we present some new ideas to overcome these difficulties. Three new air-suspended pucks are studied. One of them carries its own supply or air and is equipped with an electronic circuit coupled to an electromechanical system that provides an easy and inexpensive way to record its trajectory. The other two have an air pump fastened to them and use electromechanical system similar to that of the first model. Experiments performed with the three versions that have been constructed are also presented and analyzed.
 
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RobertoHesselM.pdf (5.13 Mbytes)
Publishing Date
2009-11-10
 
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