Posted by **Chimera** on Wednesday, September 26, 2012 at 11:07pm.

An automobile and train move together along

parallel paths at 21.8 m/s.

The automobile then undergoes a uniform

acceleration of −4 m/s

2

because of a red light

and comes to rest. It remains at rest for 19.1 s,

then accelerates back to a speed of 21.8 m/s

at a rate of 3 m/s

2

.

How far behind the train is the automobile

when it reaches the speed of 21.8 m/s, assuming that the train speed has remained at

21.8 m/s?

Answer in units of m