Consider the experiment shown in Figure \(\PageIndex{1}\): two balls are initially at the same height above the floor; both are released at the same time, but one is allowed to fall vertically, while ...Consider the experiment shown in Figure \(\PageIndex{1}\): two balls are initially at the same height above the floor; both are released at the same time, but one is allowed to fall vertically, while the other is given an initial velocity \(v_{0}\) in the horizontal direction. The reason is that the horizontal and vertical components of the motion are independent-the horizontal motion of the second ball has no effect on its vertical motion.