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All Journal Edufisika: Jurnal Pendidikan Fisika
Saumarachmawati, Putri Ani
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Education Physics

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PENENTUAN PERCEPATAN GRAVITASI BUMI BERBANTUAN MEDIA PHET DENGAN TEKNIK RATA-RATA BERBOBOT Saumarachmawati, Putri Ani; Toifur, Moh
EduFisika: Jurnal Pendidikan Fisika Vol 9 No 3 (2024): EduFisika: Jurnal Pendidikan Fisika Volume 9 Nomor 3 December 2024
Publisher : Program Studi Pendidikan Fisika FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59052/edufisika.v9i3.36705

Abstract

The value of gravitational acceleration (g) varies across different locations depending on the distance from the surface to the Earth's center of mass. Additionally, the value of ggg is influenced by the data processing method employed. This study aims to determine the Earth's gravitational acceleration in the Banten region using a pendulum assisted by the Phet pendulum-lab simulation. The experiment was conducted using two methods: the average technique and the weighted average technique. For the average technique, the period was measured 10 times for a string length of 80 cm. For the weighted average technique, the period of the pendulum swing was measured at varying string lengths from 80 to 100 cm, with five variations, each measured 10 times. The results of the study showed that the gravitational acceleration determined using the average technique was 9.72 ± 0.28 m/s², while the weighted average technique yielded 9.78 ± 0.08 m/s². With the reference value of gravitational acceleration being 9.80 m/s², the weighted average technique successfully corrected the relative error from 0.82% to none. Moreover, the determination of gravitational acceleration using the weighted average technique produced more accurate results compared to the average technique. This study also confirms that the PhET simulation is an effective and reliable tool for measuring gravitational acceleration, particularly when physical experimental conditions are less than ideal. The weighted average technique significantly contributes to improving measurement precision, making it valuable for both physics research and education
ANALYSIS OF TEMPORAL VARIABILITY OF TIDEs AT STASIUN PASANG SURUT MAUMERE ON JANUARY 2023 Saumarachmawati, Putri Ani; Pramudya, Yudhiakto
EduFisika: Jurnal Pendidikan Fisika Vol 10 No 1 (2025): EduFisika: Jurnal Pendidikan Fisika Volume 10 Nomor 1 April 2025
Publisher : Program Studi Pendidikan Fisika FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59052/edufisika.v10i1.36825

Abstract

Tides is caused by the gravitational forces of celestial bodies such as the sun and moon, lead to fluctuations in sea level on Earth. This study analyzes the frequency and height of tides measured by the Maumere tidal station (Stasiun pasang Surut Maumere) from January 12 to 14, 2023, comparing observed changes with theoretical predictions. The Fast Fourier Transformation (FFT) method, implemented via Microsoft Excel, was employed to dissect the tidal signal into its frequency components. Results indicate that the Maumere sea exhibits a diurnal tide cycle with an average height of 1.57 m during the observation period. The observed maximum tidal height change was 0.76 m, while the theoretical prediction, based on the Earth-moon distance of 0.37 million km on January 14, was 0.6 m. The root mean square error (RMSE) between observed and predicted tidal heights was 0.34 cm. This analysis demonstrates that FFT can effectively characterize tidal frequencies and contributes to the understanding of tidal behaviors, enhancing predictive models in oceanography.
Co-Authors Moh. Toifur Yudhiakto Pramudya