Tracker Video Analysis as a Pedagogical Tool for Teaching Uniform and Uniformly Accelerated Linear Motion: An Accessible Approach for Physics Education in Timor-Leste

This study investigates the use of Tracker video analysis as an accessible tool for exploring uniform linear motion (ULM) and uniformly accelerated/decelerated linear motion (UALM) in a resource-limited physics education context in Timor-Leste. Motion experiments were recorded with a smartphone and analyzed using Tracker to obtain position–time and velocity–time data, which were processed in Microsoft Excel for curve fitting and residual inspection. For ULM, the velocity remained approximately constant at v = 1,47 m/s, with apparent acceleration fluctuating around zero due to numerical differentiation. In accelerated UALM, quadratic position–time and linear velocity–time fits yielded a consistent acceleration of a = 1,68 ± 0,04 m/s² with coefficients of determination R² ? 0,93 and relative deviation ? 1,2%. Decelerated UALM exhibited a small negative acceleration (a ? ?0,0118 m/s²) with an initial velocity of v? ? 0,54 m/s, producing nearly linear position–time behavior and a residual error of RMSE = 3,88 m. These results demonstrate that Tracker can reliably identify motion types and extract kinematic parameters when combined with external data analysis. Potential pedagogical use is discussed; however, formal learning outcomes were not measured and are recommended for future investigation.