Measurement of "g" Using a Steel Ball and a Smartphone Acoustic Stopwatch

Autor/inn/en	Zhang, Jiarui; Zhang, Junhui; Chen, Qiushi; Deng, Xiaorong; Zhuang, Wei
Titel	Measurement of "g" Using a Steel Ball and a Smartphone Acoustic Stopwatch
Quelle	In: Physics Teacher, 61 (2023), S.74-75 (2 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0031-921X
Schlagwörter	Physics; Scientific Concepts; Science Education; Handheld Devices; Electronic Learning; Acoustics + Suchen Sie Ihr Suchwort? Physik; Naturwissenschaftliche Bildung; Akustik
Abstract	With the development of digital technology, plentiful sensors are embedded in the smartphone, which makes it a valuable tool for teaching elementary experimental physics. For instance, the magnetic field sensor of the smartphone has been used to measure gravitational acceleration by measuring the magnetic pendulum's oscillation period. The pressure sensor has helped explore the relationship between atmospheric pressure and altitude. The speed of sound in air can be easily measured using two smartphones with a sound sensor. Recently, Kim et al. put forward a smartphone "multiple tasking" method to analyze free-falling motion and measure the acceleration due to gravity; however, it involved a complex error analysis. To solve the problem, this experiment uses the acoustic stopwatch sensor of the smartphone, which can record the time of free-falling motion accurately. (As Provided).
Anmerkungen	American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: pubs@aapt.org; Web site: http://aapt.scitation.org/journal/pte
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01