[moderator note: Thread moved from General Physics so no template shown] a) Considering X and Y velocities are independent of one another, simply getting the 300m it covered on the X axis and the total time it was in the air, 21.0s, it's easy to get an X velocity of 14.3 m/s to the right. b) I HAVE NO IDEA. It is thrown up, reaches an unknown height with an unknown time and comes back down. By the time it reaches the 150m mark, it already has a significant vertical velocity. The only thing we really have for this is the horizontal velocity and vertical acceleration.