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.
References
1.
Patrik
Vogt
, Jochen
Kuhn
, and Sebastian
Müller
, “Experiments using cell phones in physics classroom education: The computer-aided g determination
,” Phys. Teach.
49
, 383
–384
(Sept.
2011
).2.
Patrik
Vogt
and Jochen
Kuhn
, “Analyzing free fall with a smart-phone acceleration sensor
,” Phys. Teach.
50
, 182
–183
(March
2012
).3.
Unofre
Pili
, Renante
Violanda
, and Claude
Ceniza
, “Measurement of g using a magnetic pendulum and a smartphone magnetometer
,” Phys. Teach.
56
, 258
–259
(April
2018
).4.
H. D.
Young
and R. A.
Freedman
, University Physics with Modern Physics Technology Update
, 13th ed. (Pearson Education
, Juarez
, 2012
).5.
Enrique
Arribas
et al, “Linear quadrupole magnetic field measured with a smartphone
,” Phys. Teach.
58
, 182
–185
(March
2020
).8.
Local acceleration of gravity widget, https://www.wolframal pha.com/input/?i=gravitational+acceleration+Mumbai.
9.
Readers can view supplementary material at TPT Online, 10.1119/10.0013857 under the Supplemental tab.
© 2022 Author(s). Published under an exclusive license by American Association of Physics Teachers.
2022
Author(s)
AAPT members receive access to The Physics Teacher and the American Journal of Physics as a member benefit. To learn more about this member benefit and becoming an AAPT member, visit the Joining AAPT page.
