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All Journal Pillar of Physics: Jurnal Berkala Ilmiah Fisika
- Asrizal
Department of Physics, Universitas Negeri Padang, West Sumatra
Earth & Planetary Sciences Materials Science & Nanotechnology Physics

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Design and Construction of Modeling Tool of Linear Motion Experiment Assisted Toy Cars With Speed Control for Video Tracker Analysis Firma Lestari; - Asrizal
PILLAR OF PHYSICS Vol 15, No 1 (2022)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12649171074

Abstract

Experimental activities aim to improve understanding and thinking skills in understanding physics concepts. But in reality, the experiment has not been carried out properly, due to the use of manual instruments so it affects the results of the linear motion experiment obtained. As a solution to the problem, namely by making a linear motion experimental modeling tool assisted by a toy car with speed control for video tracker analysis. The purpose of this study is to determine the performance specifications of the linear motion experimental modeling tool, the accuracy and precision of the time measurement on the linear motion experimental modeling tool, to determine the effect of the relationship between physical quantities on the linear motion. The type of research conducted in engineering research. The data analysis technique used is descriptive data analysis and error analysis. From the data analysis, it can be stated three results of this research. First, the performance specifications of the linear motion experimental modeling tool consist of toy cars measuring 13x7 cm, controlling the dc motor using a step-down xl-6009 dc-dc, measuring angles using mpu6050, trajectory measuring 2.0x0.10 m, processing experimental results using tracking software. Second, the average accuracy of time measurement in LMCV is 98.16% with an average error of 1.93%. The average accuracy of time measurement in LMCV is 98.38% with an average error of 1.53%. Third, the velocity value obtained is proportional to the applied voltage value, while the acceleration value is proportional to the increase in the angle used.
Design and Build a Straight Motion Experiment Set With Remote Laboratory Based on the Internet of Things Arif Farma Putra; - Asrizal; - Yohandri
PILLAR OF PHYSICS Vol 15, No 1 (2022)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12603171074

Abstract

The era of the Industrial Revolution 4.0 is an era that has no boundaries to advance science-technology. Experimental tools are currently still using manual tools. The solution for the pandemic is a remote laboratory. Remote Laboratory is a remote laboratory using the internet with real components. This study aims to specification performance, design specifications on the experimental set of Uniform Motion with Remote Laboratory based on internet Of Things. The research carried out is included in engineering research. There are two methods of measuring data, namely direct measurement and indirect measurement. The experimental set has a size of 60x20 cm. The sensor used is infrared avoid obstacle which functions as a counter to the object's travel time. blynk application as tool control center. The Straight Motion experiment set with internet-based Remote Laboratory Of Things has an average accuracy of 98.6 % and an average accuracy of 0.96. The data that has been obtained shows that this experimental set can be used for GLB and GLBB.
Comparison Study Of Measurement Results Between Rain Gauge 7052.0100 and Optical Rain Gauge 815 at Lapan Kototabang Ulfa Fadhilah; - Asrizal; - Yohandri; - Syafriani; Ridho Pratama
PILLAR OF PHYSICS Vol 15, No 1 (2022)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12529171074

Abstract

In general, the population in Indonesia is a farmer. This causes farmers to need information about the weather to carry out agricultural activities. One way to obtain information about the weather is to use the Rain Gauge instrument. In this study, the Rain Gauge instrument at LAPAN Kototabang from 2020 to 2021 was compared with the Optical Rain Gauge instrument. This research uses descriptive research with secondary data in the form of rainfall intensity data that has been measured on the Rain Gauge and Optical Rain Gauge from LAPAN Kototabang. This research was conducted to analyze the output data from the Rain Gauge and Optical Rain Gauge in the form of rainfall intensity, rainfall accumulation, and time. From the data analysis, two results can be stated from this research. First, the analysis of the rainfall parameter data that has been processed shows that the rainfall in Kototabang in January - October 2020 and 2021 has a high rainfall value. This causes the intensity of rainfall in Kototabang to be categorized as heavy rain. The two accumulations of rainfall in 2020 and 2021 in the Kototabang area are 497.031 mm and 0.602 mm using the Rain Gauge. While the measurement using Optical Rain Gauge rainfall intensity is 0.207 mm and 0.221 mm. This proves that the intensity of rainfall in 2020 is greater than the intensity of rainfall in 2021.
Android-Based Measurement Design of Leg Muscle Power Muhammad Irsyad; - Yohandri; - Asrizal; Nurul Ihsan
PILLAR OF PHYSICS Vol 15, No 1 (2022)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12329171074

Abstract

Leg muscle power is a combination of strength and speed, or maximal muscle performance at maximum speed. At this time the measurement of leg muscle power is still using manual tools that require a lot of people, and the measurement of leg muscle power is still lacking the jump distance. Based on the problems obtained, the author makes a production Android-based measurement design of leg muscle power. This study aims to determine the performance and specifications of Android-based measurement design of leg muscle power. This research is an engineering study to determine the performance specifications and design of an android-based leg muscle strength measurement tool. Based on the results of the analysis of the data obtained, the performance and design specifications of the tool are obtained. The performance specifications of the tool acquire the mechanical shape of the tool. The tool will automatically measure the strength of the leg muscles, and the measurement results can be viewed via Android. The design specifications are obtained from the characteristics of the sensor, accuracy and precision of the tool. Sensor characteristics can be seen from the load cell and ultrasonic sensors. The accuracy level of the leg muscle explosive power measurement tool obtained is 98.06%, and the instrument precision level obtained is 95.30%.
Co-Authors Arif Farma Putra Firma Lestari Muhammad Irsyad Nurul Ihsan Ridho Pratama Syafriani Syafriani Ulfa Fadhilah Yohandri