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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Indonesian Review of Physics (IRiP)
Rosly Jaafar
Universiti Pendidikan Sultan Idris
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics

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Developing Student Worksheets Using Inquiry-based Learning Model with Scientific Approach to Improve Tenth Grade Students Physics Competence Yulkifli Yulkifli; Rosly Jaafar; Liza Resnita
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 10 No. 1 (2020)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v10n1.p56-70

Abstract

Students' Physics Competencies are not still optimal. One of the causes is the use of student worksheets as the teaching materials that have not yet been suitable for the structure of good student worksheets. In addition, the student worksheets are not developed using the inquiry-based learning model and scientific approach. The purpose of this study is to describe the characteristics and produce valid, practical, and effective student worksheets using the inquiry-based learning model with a scientific approach to improve the tenth-grade students' physics competencies. This research used the Plomp model as the design, which consisted of preliminary research, development or prototyping, and assessment. The data were analyzed using a descriptive percentage technique, describing the student worksheets' validity, practicality, and effectiveness. Based on the preliminary research results, it was found that needs analysis, student analysis, and material analysis were required to be a reference in developing student worksheets using the inquiry-based learning model with a scientific approach. The design stage results show that the student worksheets have been designed using an inquiry-based learning model with a scientific approach. The results of the development phase show that the student worksheets meet the valid criteria of 0.94. The implementation phase results show that the student worksheets meet the very practical criteria based on the teacher's and students' responses, with the percentage of 91.05% and 78.39%, respectively. The results of the evaluation phase show that the student worksheets meet the effective criteria, including attitude (85.81%), knowledge (85.46%), and skills (85.69%). Based on the results of the study, it is concluded that the student worksheets using the inquiry-based learning model with an effective scientific approach to improve the tenth-grade students' physics competencies.
Effect of the Magnetic Force on Ferrite Pendulum Oscillation Parameters: Parametric Analysis on Ferrite Pendulum Rusli Adi; Moh Toifur; Ishafit Ishafit; Rosly Jaafar
Indonesian Review of Physics (IRiP) Vol. 3 No. 1 (2020)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v3i1.1836

Abstract

The magnitude of the damping force of the mathematical pendulum swinging on a medium is usually proportional to the speed of the pendulum. In this research, the pendulum oscillation parameters oscillating on an air medium under the influence of a magnetic field of 1.8 G will be investigated. In the initial stage, the effect of the magnetic force on the damping coefficient of ferrite pendulum oscillations with an initial deviation of 15 degrees observed. Furthermore, the study continued with varying the angle of deviation from 5 degrees to 25 degrees. The results of the data fitting amplitude (xi) at various swing times (ti) are using to analyze the effect of the angle of deviation on the maximum amplitude. The results showed that for the deviation angle of 15o the coefficient of damping of the medium affected by the magnetic force was 0,0022 greater than the coefficient of air damping 0,00006. It affects the amplitude, which decreases faster than the pendulum amplitude without the influence of magnetic force. Variation in the angle of deviation also affects the amplitude of the pendulum. In the deviation angle below 10, the pendulum motion is more influenced by the magnetic force, whereas in the deviation above 10, the pendulum motion is more dominated by gravity.
Co-Authors Ani Rusilowati Ishafit Ishafit Liza Resnita Mahardika Prasetya Aji Moh. Toifur Ridho Adi Negoro Rusli Adi Yulkifli Yulkifli