V=Vo+at几个重要推论:(1) Vt2 - V02 = 2as (匀加速直线运动:a为正值 匀减速直线运动:a为正值) (2) A B段中间时刻的即时速度:Vt/ 2 == A S a t B (3) AB段位移中点的即时速度:Vs/2 = 匀速:Vt/2 =Vs/2 ; 匀加速或匀减...