Data Analysis of Simple Harmonic Motion for the Pendulum by Using a Smart-phone Sensor
Se-Hun Kim ∗
Faculty of Science Education, Jeju National University, Jeju 690-756, Korea (Received 6 October 2014 : revised 26 October 2014 : accepted 27 October 2014)
We investigated the simple harmonic motion of a pendulum by using the accelerometer sensor embedded in a smart-phone. For data collection, the pendulum’s motion were measured by using the 3D accelerometer sensor, and the recorded acceleration data were transferred from the smart-phone’s memory to the personal computer holding Microsoft Excel files by means of an e-mail attachment.
The physical quantities, maximum amplitude of the angular displacement, the damping factor, the angular frequency, the relaxation time, etc., were produced by using a regression analysis correlated to the experimental acceleration data. The angular frequency, the angular velocity, the angular acceleration and the phase space were simulated on the basis of the computed fitting parameters.
PACS numbers: 07.07.Df, 04.80.-y, 06.30.Gv, 07.05.Hd, 07.05.Tp
Keywords: Smart-phone, Simple pendulum, Acceleration sensor, Harmonic motion, Free Damped motion
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PACS numbers: 07.07.Df, 04.80.-y, 06.30.Gv, 07.05.Hd, 07.05.Tp Keywords: Û ¼ à Ô : r, é ß , 5 Å q ¸ G ' p" f, ¸ oî r1 l x, Ä »y û Z
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