Final answer:
The block's acceleration in the x-direction is 0 meters per second squared due to the vertical nature of gravity.
Step-by-step explanation:
The block's acceleration in the x-direction, ax, is 0. The given information states that ax = 0 because gravity is vertical. When ax = 0, it means that the initial velocity in the x direction is equal to the final velocity in the x direction, or Ux = Vox.
Therefore, the block's acceleration in the x-direction is 0 meters per second squared.