A B
C D
6 ( )
A
B
C
D
7
A 2 s 10
B 2 s 20
C 2 s 10 m
D 2 s 20 m
8 m
F h
g
A Fh
B Fh
C Fmgh
D mgh
9 P
P 1.25m
g=10m/s2
A2.5m/s B1.25m/s C1 m/s D0.8m/s
10 F s.
F
AFs BFscos CFssin DFs tan
11
A
B
C
D
12 Mm (M>m)
1
FM 1
W2
F
