関連ワード:  the vertical component of a projectile's velocity is constant    the vertical component of a projectile's velocity is changing at a constant rate    the vertical component of a projectile's velocity is a constant value of 9.8 m s    why is the horizontal component of a projectile velocity constant    the vertical component of the velocity is constant for a projectile in flight    the vertical component of the velocity of the projectile is constant true or false  
結果 : the vertical component of a projectile's velocity is constant