球从高处自由下落，每次接触地面后弹起的高度是前一次下落高度的5分之2.如果球从125米高处落下，

来源：百度知道编辑：UC知道时间：2024/06/14 19:56:30

那么第三次弹起的高度是多少米？（要写过程）

第一次弹起高度125*2/5;
第二次弹起高度(125*2/5)*2/5;
第三次弹起高度[(125*2/5)*2/5]2/5，即125*8/125=8米；
……
第n次弹起高度125*（2/5）^n。

这个球什么时候弹不起来呢？
《庄子》曰：一尺之棰，日取其半，万事不竭。

1-2/5=3/5
125*(3/5)*(3/5)*(3/5)=27米

ryw6j6666666666666666666666666666666666666666666666666666666666666666wwwwwwwwwwwwwwwwjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

球从高处自由下落，每次接触地面后弹起的高度是前次下落高度的5分之2下. 球从高处自由下落,每次接触地面后弹起的高度是前一次下落高度的2/3。一球从4.9m高处自由落下,每次与地面接触后反弹的速度减少到碰前的4/9 一物体从45米高处自由下落到地面时所需要的时间为（）秒，物体落地是的速度为（）米/秒。一小球从高处自由下落,用闪光照片拍下小球下落过程请问,一个物体从高处下落,要如何计算它对地面的压力呢? 一个物体从一高处自由下落,以知最后一秒内下落25m,求起下落告诉及下落时间谢谢~~ 一物体从45米高处自由下落,再最后1秒的初速度为多少? 一物体从H高处自由下落,经时间t落地,则当它下落t/2时,离地的高度[ ] 当一个从高处下落的物体，在距地面100米处，时间突然停止，之后又恢复，请问此时物体的速度？