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题目
Two identical balls roll off the edge of a horizontal table top.One leaves traveling at twice the
Two identical balls roll off the edge of a horizontal table top.One leaves traveling at twice the speed of the other.Which ball hits the floor first?Why?

提问时间:2021-03-12

答案
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
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