C10m/s
D5m/s
6 P
P 1.25m
g=10m/s2
A2.5m/s B1.25m/s C1 m/s D0.8m/s
7 AB
A
B A B
C A B
D A B
8
A10 N, B6N C2N D0
9 m q v0A
B vB=2v0 AB
( )
A. B. C. D.
10
( )
