Hello, This is a quick question that I want to know, When an object falls, does the vertical falling speed stay the same with any horizontal speed? To be more clear about this question, this is an example: There is a bullet. 1. The bullet falls from 10 meters above the ground without any change in rotation. 2. The bullet is fired from 10 meters above the ground, again without any change in rotation. I know that it will hit the ground at the same time if there is no air resistance but I don't know which one will hit the ground earlier where there is air resistance? Will the speed of the bullet matter? Does air actually make it fall slower? Thank you.