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远处的妈妈只感觉自己变成了一支箭飞快的奔了过来,准确接住了从楼上掉下来的孩子。人们对这一速度难以置信。因为当时妈妈的速度是不可思议的,连运动员都无法达到那样的速度。 PowerPoint PPT Presentation


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一位普通的妈妈,身体纤弱,轻声细语,几乎不爱任何的体育运动,一天,她出去买东西,孩子自己在家里。不懂事的孩子从开着的窗子上探出了头,正好看见妈妈在远处回来。孩子兴奋的手舞足蹈,不小心从窗口那掉了下来,周围的人们都目睹了这一幕:. 远处的妈妈只感觉自己变成了一支箭飞快的奔了过来,准确接住了从楼上掉下来的孩子。人们对这一速度难以置信。因为当时妈妈的速度是不可思议的,连运动员都无法达到那样的速度。. 你能根据当时的情景测出这位母亲的奔跑速度吗?需要知道什么物理量 ?. 一、演示实验 :. 演示实验一、从同一高度同时释放等面积的书和纸片。 实验现象:书下落的快。.

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远处的妈妈只感觉自己变成了一支箭飞快的奔了过来,准确接住了从楼上掉下来的孩子。人们对这一速度难以置信。因为当时妈妈的速度是不可思议的,连运动员都无法达到那样的速度。

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