Projectiles

     A projectile that is launched into the air and is only affected by gravity.  One example of a projectile is a ball much like this.  

     Once this ball is thrown it becomes a projectile.  As soon as it is launched, there is nothing that affects it except for gravity. The motion of the ball is then a parabola because it will go up then gravity will eventually draw it back down.  

     However, the balls acceleration is always zero in the x-axis but its acceleration on the y-azis is 9.8m/s2 down which is the acceleration of gravity.