[填空题]
A fugitive tries to mqov;3sg g+,(txdv m*hop ony uv l*ludhzf86 /yp;*j2v ; juakm-/z a freight train traveling at a constant speed of 6.0 m/s Just as 8ymk6 ;j/zfuy/*vh;uvpaj *z -d2lluan empty box car passes him, the fugitive starts from rest and accelerates 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