A projectile is an object that is launched into the air and moves under the influence of gravity and air resistance. Two factors affecting projectiles in sports are:
Angle of Projection: The angle at which an object is launched affects its trajectory. For example, in javelin throwing, the angle at which the javelin is thrown can determine how far it travels.
Initial Velocity: The speed at which an object is launched also plays a role. In basketball, the initial velocity of a free throw can determine whether it goes through the hoop or not.