Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/96249
Title: | Mechanical apparatus for the fold catastrophe demonstration | Authors: | Fiolhais, M. Golli, B. Nogueira, R. N. |
Issue Date: | 2021 | Publisher: | IOP Sceince | Serial title, monograph or event: | European Journal of Physics : a journal of the European Physical Society | Volume: | 42 | Issue: | 4 | Abstract: | We present and discuss a non-expensive mechanical experiment which is very suitable for a classroom demonstration of the fold catastrophe behaviour. The apparatus consists of a bar attached to a pulley, to which a hanging body is connected by means of a thread wrapped around its rim. The system may perform stable oscillations or, else, the body may continuously fall down, while the pulley executes a sequence of 360° rotations. This behaviour is analysed in connection with the shape of the potential, which is a good example of a fold catastrophe potential. For the system to perform stable oscillations, that shape reminds a clothes washboard, with local maxima and minima, a potential well known in superconducting quantum computing. We provide some hints for the instructor to explore the device in lab classes. | URI: | https://hdl.handle.net/10316/96249 | ISSN: | 0143-0807 1361-6404 |
DOI: | 10.1088/1361-6404/abf059 | Rights: | openAccess |
Appears in Collections: | I&D CFis - Artigos em Revistas Internacionais |
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File | Description | Size | Format | |
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Fiolhais_2021_Eur._J._Phys._42_045001.pdf | 1.49 MB | Adobe PDF | View/Open |
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