A
B
C
D
9 A 8kgm/sB
5kgm/sA B AB
APA=6kgm/sPB=7kgm/s B PA=3kgm/sPB=10kgm/s
CPA=2kgm/sPB=14kgm/s DPA=7kgm/sPB=6kgm/s
10 1kg x=2t+t 2m t=2s
A6 W B8 W C10 W D12 W
11 1s 45m g10m/s2
A45m/s
B35m/s
C25m/s
D22.5m/s
12 , A, , ,
( )
A. B. C. D.
13 h a A
O A O_________
O ____________.
14 2m _______
m 1m 2s 1m _______s
15 5.0 10 -8 C A B 6.0 10-3 J A B
___________ V B 2.5 10 -8C A A
_________J
16 , a1, v1, 1
