DEVELOPMENT AND VALIDATION OF A TWO-TIER FORMAL REASONING TEST INSTRUMENT FOR HIGH SCHOOL STUDENTS ON THE TOPIC OF ROTATIONAL MOTION. JLu [Internet]. 2026 Aug. 1 [cited 2026 Oct. 24];7(2):161-70. Available from: https://jurnal.univpgri-palembang.ac.id/index.php/luminous/article/view/22098