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ERIC Number: EJ937873
Record Type: Journal
Publication Date: 2011-Sep
Pages: 2
Abstractor: As Provided
ISSN: ISSN-0031-921X
Experiments Using Cell Phones in Physics Classroom Education: The Computer-Aided "g" Determination
Vogt, Patrik; Kuhn, Jochen; Muller, Sebastian
Physics Teacher, v49 n6 p383-384 Sep 2011
This paper continues the collection of experiments that describe the use of cell phones as experimental tools in physics classroom education. We describe a computer-aided determination of the free-fall acceleration "g" using the acoustical Doppler effect. The Doppler shift is a function of the speed of the source. Since a free-falling objects speed is changing linearly with time, the Doppler shift is also changing with time. It is possible to measure this shift using software that is both easy to use and readily available. Students will use the time-dependency of the Doppler shift to experimentally determine the acceleration due to gravity by using a cell phone as a freely falling object emitting a sound with constant frequency.
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A