2019-2020
1
A
B
C
D
2 40km/h 0.6m/s 2 10s
A17km/h B18km/h C46km/h D61km/h
3 ( )
Am/s B N C m D m/s2
4 M60 kg m40 kg
2 m/s 2
( ) (g 10 m/s 2)
A600 N
B280 N
C320 N
D400 N
5 ABs-t
A 5s 5s AB
B AB3s
C 3s vA>vB
D5s AB
6
A B C D
7 12 12
60 45
