2019-2020
1
A
B
C
D
2 5m/s
A10m/s B 5m/s C -5m/s D 0m/s
3 AB
A m0 mB FB
m F=F0 g ( )
Am F
Bm F
CA 0
02
F
mg
D mm0 m
4
A2
B
C
D
5 m a P
P/2
ma