A0.01 N B0.02 N
C0.03 N D0.04 N
6 5s
A25m B50m C120m D135m
7
A
B
C
D -
8
A
B
C
D
9 0.2
900 300 20
1 1 2 1
W/ 10 2 3 10
A B C D
10 90m g=10m/s2
A.90m/s B.30m/s C.10m/s D.3m/s
11AB A B
A. A B
B. A B
C. A B
