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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:56 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Physics Education
Title:
Simple experiments for high school physics using a display interface and a system of coupled pendulums
Authors:
Claudia CZIPROK(1,2), Cristina MIRON(1), Florin F. POPESCU(1)
Affiliation:
1) Department of Physics, University of Bucharest
2) "Mihai Eminescu" National College, Satu Mare
E-mail
clcziprok@yahoo.com
Keywords:
coupled pendulums, connecting rod, small oscillations, beat period, beat frequency, display interface, PASCO Scientific, motion sensor, AirLink, iPad, SPARKVue App
Abstract:
This paper presents an experimental approach using a system of coupled pendulums by a thin rod. This experiment was simplified by using modern technology equipment. Also, the interest of students and their active participation in performing that kind of experiments was increased [1]. For this, we used a projector for viewing the process on big screen, a motion sensor for experimental data collection, and an iPad with SPARKVue interface for graphical representation and analysis of the results in real time. One of the themes of the experiment was to investigate how the time of energy / motion transfer between the two bobs varies as a function of the height of the coupling rod [2]. For this, during experiments, students were asked to use timers of their smartphone to measure time, for different positions of the coupling rod, and record the data in the table on the worksheet. From the graph, we deduce the g value and confirm the distance from the bob to the support. Also, using the SPARKVue display interface for the motion of one bob from this coupled pendulums model, easily generated the fascinating Lissajous figures. They involve two perpendicular harmonic motions, one of the components involves time-varying amplitude, a feature that not present in the production of most Lissajous patterns [3].
References:
[1] V. Šlekienė, L. Ragulienė, Problems of Education in the 21st Century, 24, 120-129, (2010).
[2] V. Picciarelli, R. Stella, Phys. Educ. 45(4), 402-408, (2010).
[3] J. Priest, J. Poth, Phys. Teach. 20, 80–85, (1982).
Acknowledgement:
Claudia Cziprok was supported by the strategic grant POSDRU/159/1.5/S/137750, ”Project Doctoral and Postdoctoral programs support for increased competitiveness in Exact Sciences research” cofinanced by the European Social Found within the Sectorial Operational Program Human Resources Development 2007 – 2013.
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