(7分)一辆偷运毒品的汽车高速驶近某边防检查站,警方示意截停

7分)一辆偷运毒品的汽车高速驶近某边防检查站,警方示意截停,毒贩见势不妙,高速闯卡.由于原来车速已很高,发动机早已工作在最大功率状态,在平直公路上运动的位移可用s140t(m)来描述.运毒车过卡的同时,原来停在旁边的大功率警车立即起动追赶,直到追上毒贩.警车运动的位移用s22t2m)来描述。g10m/s2,则运毒车逃跑时的速度为________m/s,警车追赶的加速度为________m/s2,警车在离检查站________m处追上毒贩。

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