Teaching the moment of inertia by measuring the angular speed with a smartphone's sensors

This paper demonstrates the use of the sensors of a smartphone in recording experimental data for studying the moment of inertia of a compound pendulum. The smartphone was attached to the beam to record at various points the angular position and angular speed of a compound pendulum. We altered the p...

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Bibliographic Details
Published in:Physics education 2021-03, Vol.56 (2), p.23011
Main Authors: Puttharugsa, Chokchai, Chatchawaltheerat, Theerawat, Teeratchanan, Pattanasak
Format: Article
Language:English
Subjects:
Angular position
Angular speed
moment of inertia
Moments of inertia
Pendulums
Sensors
smartphone sensors
Students
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Summary:This paper demonstrates the use of the sensors of a smartphone in recording experimental data for studying the moment of inertia of a compound pendulum. The smartphone was attached to the beam to record at various points the angular position and angular speed of a compound pendulum. We altered the position of the smartphone along the beam resulting in the change of the system's moment of inertia. The experimental result agreed with the theoretical calculation. This experiment will stimulate students to conduct such an experiment themselves and helps students understand the relationship between angular speed and its moment of inertia.
ISSN:0031-9120
1361-6552
DOI:10.1088/1361-6552/abdfaf