閃貓撞破護欄 yaris墜橋15米駕駛驚魂 - 汽車
By Megan
at 2019-02-20T13:01
at 2019-02-20T13:01
Table of Contents
假設不考慮空氣阻力,
15公尺高,
用能量轉換的方式換算末速度,
mgh=0.5mv^2
m是質量
g是地球重力(以9.8公尺/平方秒計)
v是速度(公尺/秒)
h是高度(公尺)
1.m消掉
gh=0.5v^2
2.移向加代入
v=(2gh)^0.5
=(2*9.8*15)^0.5
=294開平方根
=17.15(公尺/秒)
=61.73(公里/小時)
好啦其實忽略空氣阻力也才等於時速61.73公里撞牆,
考慮空氣阻力有可能不到60公里,
撞擊測試仍然不具參考價值,謝謝
--
15公尺高,
用能量轉換的方式換算末速度,
mgh=0.5mv^2
m是質量
g是地球重力(以9.8公尺/平方秒計)
v是速度(公尺/秒)
h是高度(公尺)
1.m消掉
gh=0.5v^2
2.移向加代入
v=(2gh)^0.5
=(2*9.8*15)^0.5
=294開平方根
=17.15(公尺/秒)
=61.73(公里/小時)
好啦其實忽略空氣阻力也才等於時速61.73公里撞牆,
考慮空氣阻力有可能不到60公里,
撞擊測試仍然不具參考價值,謝謝
--
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汽車
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