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ERIC Number: EJ1359722
Record Type: Journal
Publication Date: 2022-Sep
Pages: 7
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0031-9120
EISSN: EISSN-1361-6552
Falling Beads on a Falling Rod
Lindén, Johan; Anttu, Nicklas
Physics Education, v57 n5 Article 055030 Sep 2022
The falling rod paradox, i.e. the fact that the tip of an almost horizontal rod falls with an acceleration 'higher than g', when the other end is hinged or supported, is a popular physics demonstration. It can be visualized by placing e.g. a coin on the tip of the rod and fixing a cup next to the coin. When the rod is released the free-falling coin is left behind and, if the vertical projection of its position is well aimed, the coin ends up in the cup. In this work we aim at visualizing the falling-rod paradox using a high speed camera and experimentally determine the point on the rod where the acceleration a = g for various setups. To enhance the visualization we use evenly spaced beads on top of the rod. The experiments can be performed by pupils in the upper secondary school. Theoretical understanding may require first-year university classes in mechanics.
IOP Publishing. 190 North Independence Mall West Suite 601, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail: ped@ioppublishing.org; Web site: https://iopscience.iop.org/journal/0031-9120
Publication Type: Journal Articles; Reports - Research
Education Level: Secondary Education; High Schools; Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A