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Penentuan percepatan gravitasi bumi lokal dengan Bantuan sistem pegas-massa dan sensor ultrasonik KARTIKA WIDYANINGRUM
Inovasi Fisika Indonesia Vol 4 No 3 (2015)
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (651.685 KB) | DOI: 10.26740/ifi.v4n3.p%p

Abstract

Abstrak Penelitian skripsi ini bertujuan untuk menentukan percepatan gravitasi bumi lokal dengan bantuan osilasi sistem pegas-massa vertikal yang dimonitor oleh sensor ultrasonik SRF05 berbasis mikrokontroler. Seri percobaan osilasi di Lab Fisika Eksperimen, Gedung C2 lantai 3, Jurusan Fisika dilakukan melalui variasi empat pegas yang berbeda karakteristik dan tiga massa beban. Percepatan gravitasi bumi diperoleh melalui persamaan sederhana yang menghubungkan antara nilai percepatan gravitasi bumi dan periode osilasi yang ditentukan melalui dua cara, yaitu perhitungan teoretik dan pengukuran langsung dengan sensor SRF05. Hasil-hasil percobaan menunjukkan bahwa nilai percepatan gravitasi bumi lokal di Lab Fisika Eksperimen menurut sensor SRF05 adalah 9,71±0,07 m/s2, tidak tergantung pada jenis pegas dan massa beban, mendekati nilai referensi 9,78 m/s2 yang berlaku di daerah dekat ekuator. Konsistensi dan akurasi temuan penelitian ini didukung oleh nilai percepatan gravitasi bumi lokal menurut PASCO model ME-9210A sebesar 9,63±0,23 m/s2 dan menurut estimasi dengan mempertimbangkan massa pegas dalam dinamika osilasi sistem pegas-massa sebesar 9,66±0,03 m/s2. Standar deviasi yang cukup tinggi dalam penelitian ini menunjukkan bahwa tingkat presisi pengukuran periode osilasi dengan sensor SRF05 masih relatif rendah. Kata Kunci :gravitasi bumi lokal, osilasi sistem pegas-massa, sensor SRF05 Abstract This research is aimed to determine local gravitational acceleration using vertical mass-spring oscillation monitored by a microcontroller-based SRF05 ultrasonic censor. A series of laboratory experiments were performed by varying types of spring and masses of external load. Gravitational acceleretation is obtained from a simple equation, relating local gravity to a period of oscillation, determined using theoretical consideration and direct measurements with the SRF05 censor. The results for all parameters considered show that gravitational acceleration in Experimental Physics Lab, located at Building C2, 3rd floor, Physics Department is 9.71±0.07m/s2, independent of spring type and load mass usedand close to the reference value 9.78 m/s2 in regions nearby the equator. Consistency and accuracy of the primary finding are then supported by measurements using PASCO type ME-9210A that give 9.63±0.23m/s2 and theoretical estimates considering mass of spring that give 9.66±0.03m/s2. A relatively high value of standar deviation quoted in the research finding indicates that level of data precision in the measurements of oscillation period using the SRF05 censor needs to be improved for future work. Keywords : gravitational acceleration, mass-spring oscillation, SRF05 censor
Pemberdayaan Guru SD Gugus Srikandi dalam Implementasi Model Pembelajaran Inovatif Kurikulum Merdeka Sri Sukaesih; Sri Ngabekti; Saiful Ridlo; Kartika Widyaningrum; Risa Dwita Hardianti; Sumardani
Jurnal Dharma Indonesia Vol. 3 No. 2 (2025): Jurnal Dharma Indonesia
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jdi.v3i2.27526

Abstract

The “Merdeka Belajar” policy and Merdeka Curriculum, initiated by the Ministry of Education and Culture, represent a significant educational innovation in Indonesia. Gugus Srikandi, located in the Gunung Pati District, is an elementary school implementing the Merdeka Curriculum. However, several challenges persist in its implementation. Notably, 67% of teachers report the need for further strengthening in the use of interactive and meaningful learning models to achieve competency and the Profile of Pancasila Students. Observations indicate that teachers have received limited socialization related to the practical implementation of learning models. Furthermore, teachers' readiness to develop and evaluate learning activities with the curriculum still requires improvement. The objective of this initiative was to enhance teachers’ understanding of innovative learning models within the Merdeka Curriculum, as well as to empower them to design and implement active learning. The methodology of this activity involved several stages: needs analysis, program development, program implementation, observation and monitoring, and reflection and evaluation. The training and workshop activities were attended by 80 participants from elementary schools in the Gugus Srikandi. The results of the workshop indicate that teachers at Gugus Srikandi have developed strong pedagogical competencies in designing, implementing, and evaluating learning in accordance with the Merdeka Curriculum. Teachers are now able to apply innovative learning models to create active and contextual learning experiences