[填空题]
A fugitive tries to hop on a f h su 52kmuu9hd1jo.u(reight 1hj** : fxkurgtrain traveling at a constant speed of 6.0 m/s Just as an empty box car passes him, the fugitive starts from rest and a fj1 kr*guhx:*ccelerates at $a\,=\,4.0 m/s^2$ to his maximum speed of 8.0 m/s
(a) How long does it take him to catch up to the empty box car? s
(b) What is the distance traveled to reach the box car? m