(5) What is the acceleration in the horizontal direction?
This ball is an object in free fall, so the only acceleration acting on it is the acceleration due to gravity. Since gravity has no horizontal component, the acceleration in the horizontal direction is 0.
(6) How far does the ball go?
First it is necessary to find the velocity of the ball in the x direction. Using the same right triangle as before, it is clear that the horizontal velocity = 6.93m/s. (The horizontal and vertical components do not have to equal each other, but they are equal in this case.) From equation (3),
