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All Journal Impulse: Journal of Research and Innovation in Physics Education
Barokah, Najilul
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Computational Analysis of Free Fall Motion with Air Friction Constraints Miyaqi, Iqlides Ahmad; Supardi; Barokah, Najilul
Impulse: Journal of Research and Innovation in Physics Education Vol. 3 No. 1 (2023): Impulse: Journal of Research and Innovation in Physics Education
Publisher : Pendidikan Fisika FITK UIN Sunan Kalijaga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/impulse.2023.31-05

Abstract

Free fall motion without initial velocity is a mechanical concept that can be analyzed using analytical, experimental, and computational methods. Free fall motion is difficult to analyze analytically if air friction is not neglected. The aim of this research is to explain computational free fall motion analysis procedures with air friction. Air friction disturbance in free fall motion is represented by the coefficient C which states the drag coefficient is time dependent. In this scientific study, the application used for computational analysis is IDE Spyder with various library support. With the help of this application, a significant difference in the output vmax and tmax is obtained between the two cases of free fall based on the interpretation of the graph that appears.
A Physics-Based Analysis of Barrier Removal on the Yogyakarta Ring Road Using the LWR Traffic Flow Model Miyaqi, Iqlides Ahmad; Barokah, Najilul
Impulse: Journal of Research and Innovation in Physics Education Vol. 6 No. 1 (2026): Vol. 6 No. 1 (2026): Impulse: Journal of Research and Innovation in Physics Edu
Publisher : Pendidikan Fisika FITK UIN Sunan Kalijaga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/impulse.2026.61-04

Abstract

Road separators are used to divide traffic flow so that vehicle movement becomes orderly and minimizes the possibility of accidents. Recently, proposals to remove road separators have been discussed as a strategy to address traffic violations. However, the implications of such measures on traffic-flow characteristics remain unclear and require further investigation. Traffic flow on the Yogyakarta Ring Road is analyzed using a macroscopic traffic flow approach. This study is a simulation-based quantitative investigation that employs the LWR (Lighthill–Whitham–Richards) model to examine the influence of road width, vehicle speed, and traffic flux on traffic dynamics. The concept of fluid flow is used as a qualitative analogy to support the physical interpretation of traffic behavior. This study aims to assess the impact of removing separators on traffic flow characteristics. Literature review and numerical simulations implemented in the Spyder IDE were conducted to model traffic-flow patterns by varying lane width, vehicle speed, and traffic density parameters within the LWR framework. Through three traffic flow engineering simulations, Simulation results show that different vehicle categories exhibit distinct speed and traffic-flux characteristics under varying lane-width conditions. Simulation results indicate that the removal of separators may alter traffic-flow characteristics, leading to changes in vehicle speed and traffic flux that could reduce traffic-flow efficiency under the modeled conditions.
Co-Authors Miyaqi, Iqlides Ahmad Supardi