Ma'ruf, Sunardi, Sujito
This study adopts a case study design employing a qualitative descriptive method. The primary instrument in this investigation is the researcher, who gathered data through direct involvement in participant observation. This method enabled the collection of in-depth descriptions concerning the activities performed by a cohort of preservice physics teachers during their first-semester basic physics coursework, namely the application of learning using case method-based worksheets on a system for separating solid particles in water using the concept of parabolic motion as a solution to overcome clearing. The result that in parabolic motion material, most students have difficulty understanding the direction of force, how to make a force diagram, do not understand what is being depicted and do not understand how to describe the direction of force in a system. A small number of students have difficulty explaining the relationship between the force acting on an object and the motion it produces. Questions number 1, 3, 4 and 5 are included in the high category. The factor that causes students to have higher abilities is because these four materials have simpler problem solutions, do not require too many formulas and do not involve force diagrams. Initial test of students' problem solving abilities (students' ideal score is 61), and before learning their problem solving abilities were still very low. Overall, students in the experimental class had a total problem solving ability score of 7.87 or 13.00 percent, and in the control class the total problem solving ability score was 4.09 or 7.00 percent. After students followed the learning process which was facilitated with case method-based worksheets, the results of the final test of problem solving skills in the experimental class were 15.65 or 26.00 percent, and in the control class the results of the final test of problem solving skills were 14.13 or 23.00 percent. © 2026 Author(s).
Physics Education Department, Faculty of Teacher and Training Education, Universitas Muhammadiyah Makassar, Makassar, Indonesia; Education Department of Bandung City, Indonesia; Physics Department, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Malang, Indonesia
