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All Journal Phi : Jurnal Pendidikan Fisika dan Terapan Jurnal Pembelajaran Fisika
Mahfudz, Khawarizmy
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Earth & Planetary Sciences Education Engineering Environmental Science Physics Social Sciences Other

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Effect of Aluminium Plate Layers and Electric Current on Pendulum Damping Time Mahfudz, Khawarizmy; Pramudya, Yudhiakto
Jurnal Phi: Kurnal Pendidikan Fisika & Terapan Vol 11 No 2 (2025)
Publisher : Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/t56y9778

Abstract

The pendulum is a classic oscillatory system commonly used in physics to study motion and damping phenomena. One notable damping mechanism is electromagnetic damping caused by eddy current induction. This study investigates the effects of varying the number of aluminium plate layers attached to the pendulum and the electric current supplied to a surrounding coil, which generates a magnetic field, on the pendulum damping time. An experimental approach was used by measuring the damping time across different combinations of plate layers and current levels. The data were analyzed to identify the relationship between these variables and the damping behavior of the pendulum. Results indicate a negative exponential relationship between the electric current and damping time, as well as a significant effect of aluminium plate layers on damping  efficiency. Increasing the number of aluminium plate layers enhances eddy current induction, resulting in stronger damping forces.
Determination of Irrigation Water Surface Flow Velocity Using Video Analysis with Tracker Application and Linear Regression Mahfudz, Khawarizmy; Ishafit, Ishafit
JURNAL PEMBELAJARAN FISIKA Vol. 14 No. 1 (2025): Jurnal Pembelajaran Fisika (JPF) Universitas Jember
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jpf.v14i1.53687

Abstract

Advances in computer technology and software allow for more practical and accurate measurements. This study aims to measure the velocity of irrigation water surface flow using video analysis with Tracker application and linear regression in Microsoft Excel. Video data was recorded in the irrigation canal of Bendhung Lepen, Yogyakarta, using bamboo leaves as test objects. The analysis process involved tracking the motion of the object in the video and calculating the velocity based on the slope of the displacement versus time graph. The results showed that the velocity of water surface flow was (8.39 ± 0.05) cm/s from Tracker analysis and (8.39 ± 0.04) cm/s from Excel linear regression, with a correlation coefficient of 0.9985 and a coefficient of determination of 0.9971. This method proves the reliability and efficiency of a technology-based approach to water velocity measurement.
Co-Authors Ishafit Ishafit Yudhiakto Pramudya