Actually,the two balls hit the ground at the same time("t ",mentioned in the following).
Reason:According to the formular~h=1/2at*at With the same height~"h",It is determined only by acceleration due to gravity(重力加速度)~"a"(mentioned in the formular)
中文版,答案为：二者落地时间相同
原因,根据物理公式：h=1/2at*at ,其中,h代表高度,a代表重力加速度,t代表落地所需时间.由于两个球从同一高度落下,重力加速度相同,所以,由公式可知,落地时间也相同