Constant speed motion analysis using a smartphone magnetometer

Nuryantini, Ade Yeti and Sawitri, Asti and Nuryadin, Bebeh Wahid (2018) Constant speed motion analysis using a smartphone magnetometer. Physics Education, 53 (6). 065021. ISSN 0031-9120

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Abstract

This study demonstrated that the constant average speed of a dynamic car could be measured and calculated using the smartphone magnetometer. The apparatus setup was built using a dynamic car, a linear track up to 1.50 m, a bunch of magnets, and a smartphone magnetometer application. The smartphone magnetometer application, ‘Physics Toolbox Suite’, was free for the experiment. The magnet and smartphone magnetometer were attached on a linear track and dynamic car, respectively. When the dynamic car are moving on the car track, the smartphone magnetometer will measure the magnetic feld value versus the time relation. The magnetic feld value will fluctuate, increasing when close to the magnet or decrease when the distance from the magnet increases. The magnetic feld properties (peaks time) versus the magnet distance position were analyzed using linear ftting, and we fnd the average speed of the dynamic car. We hope that this magnetometer experiment will be valuably used in general physics laboratories.

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