甲车以8m/s的速度匀速行驶,乙车经过2.5s发动起来,以加速度a=2m/s^2做匀加速运动.问:1、乙车要多长时间才能追上违章的货车?2、在乙车追上甲车之前,两车间的最大距离是多大?另有疑问:为什
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