A.2m/s B.4m/s C.5m/s D.3m/s
A.2m/s2 B.0.5m/s2 C.0.2m/s2 D.0.3m/s2
A.0.5~0.35 B.0.35~0.3 C.0.3~0.2 D.0.4~0.5