If a stone with an original velocity of 0 is falling from a ledge and takes 8 seconds to hit the ground what is the final velocity of the stone

that would be because of both gravity and friction. so     c

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.