Abstract: The javelin throw is a complex athletic event that combines speed, strength, and technical precision, and is heavily governed by the principles of projectile motion. This paper presents a biomechanical analysis of the javelin throw with a focus on its projectile dynamics. The trajectory of the javelin is determined by three key parameters at the point of release: angle of projection, initial velocity, and height of release. These variables collectively influence the horizontal range and flight stability of the javelin. While a 45-degree angle theoretically yields the maximum range for a projectile launched from ground level, optimal javelin release angles are typically lower—ranging between 32° and 36°—due to the aerodynamic properties of the implement and the athlete's release height. The study further explores how angular momentum, air resistance, and lift generated by the javelin's design affect its flight path. The athlete’s run-up and final throwing mechanics, particularly the blocking of the front leg and the whip-like arm motion, are crucial in maximizing the javelin’s velocity at release. Through video motion analysis and kinematic modeling, the paper highlights the mechanical techniques that differentiate elite throwers from their peers. Understanding these projectile principles is essential for coaches and athletes aiming to optimize throwing performance and ensure injury prevention. This analysis underscores the interplay between biomechanics and physics, offering insights into technique refinement and performance enhancement in javelin throw.

| DOI: 10.17148/IARJSET.2025.125396