作者enterNTU (发发)
看板Physics
标题[问题] 一题运动学的题目请高手解一下
时间Thu Mar 27 22:27:37 2008
Car B is traveling a distance d ahead of car A.
Both cars are traveling at 20 m/s when the driver of B suddenly
applies the brakes,causing his car to decelerate at 4 m/s^2 .
it takes the driver of A 0.75 second to react. when driver of A
applies his brakes,he decelerates at 5 m/s^2. determine the distance d
between the cars so as to avoid a collision.
car A |...............| car B ..............||
d
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