太鲁阁号是摇摆式车辆,过弯时车体会倾斜,408车次在撞击后扭曲变形,产生离心力加速度,会让旅客有被抛出的感觉。
根据台铁的太鲁阁号倾斜式电联车资料,车体在曲线的向离心力方向摔出时,乘客所感受到的加速度,会增加2到3成,加上卖站票,才会造成死伤惨重。
《联合报》引述台中市忠明高中数学老师陈建铭计算,车体重量40公吨,加上行李、乘客、服务人员以500人每人平均50公斤估计全车共65公吨。
假设以最高时速130公里计算,司机在进隧道前发现肇事工程车,减速至时速100公里,假设撞击时间为0.1秒,依牛顿第二定律产生的作用力约1857公吨重。
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