A smartphone magnetometer is used to record the magnetic field of a freely falling point dipole magnet. The recorded magnetic field vs. time data are analyzed in accordance with the spatial dependence of the magnetic field to calculate the acceleration due to gravity g. The experiment gives local g to be 9.79 ± 1.9% m/s2.

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Readers can view supplementary material at TPT Online, 10.1119/10.0013857 under the Supplemental tab.

Supplementary Material

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