THE EFFECT OF THE INITIAL SHOULDER ANGLE AND ARM ANGULAR VELOCITY ON BALL SPEED DURING THE JUMP SERVE IN MALE HIGH-SCHOOL VOLLEYBALL STUDENTS AGED 16–18 YEARS IN BAGHDAD (D. B. F. Ahmed, Trans.). (2026). International Journal of Advance Research in Education & Literature (ISSN 2208-2441), 12(3), 58-62. https://doi.org/10.61841/frtqcg17