. word .
. .
2017 10
90
5 1 8 9 12 3
1.
A
B G
C k
D
2. 1
2 2 1 ( )
A 1
tan
B 2
sin
C 2 1
tan
D 2 1 tan
3. 1kg AB 7m
=0.2 vA=6m/s vB=2m/s g
10m/s2
A s
B s
C A 5.25m
D A 6m
4. -500
1
2 1
9 g
R h ( )
A 2
3
g
GR
B 2
9
g
C 2
3
D 9
2
h
5 m q E
v0ON ON 30 g mg
qE ( )
A
B g/2
