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湖南省长沙市周南中学高三物理第三次月考试卷

2007
120 90
I 60
15 4 60
1 G F 1 G

1 2 2 m1 m2 M

m1>m2 >

Am1 M m2 M

Bm1 M m2 M

C M M+ m1+ m2g 2
D M

3 2005 10 13 ,"" 2

T , H , R ,

T H R G

A

B

C D

4 3 P G Q

P P





AQ g sin

B G sin

C G cos

3

D

5 4 v T



A

B

C vT

4

D

6 5



A

B

C

D

5

7

A


B

C

D
8 6 A B.
6 A A B B A B C A B D A B 9


A

B

C

D

10 W I

AW I
BW I
CW I
DW I 11 7 m A 30 3 g h
4
A 3 mgh 4
B mgh
C mgh

D 1 mgh

7

2

12 8

a

b a c

d



A a d

8

B b

C a d c d

D b c b

13 (

)

A.

B

C()



D

14 9 M

()

m

v
() m v M
( ) 9
A

B mgv

C
D m v M

15 10 AB B B

A v B

AA B A B C B D B

v

A

B

10

60

2 2 16



168 11 A B A G 10 10 B A G B AB 10 1?

11

2 mAmB = 21 Q

P





3



178

m=1kg

12

0.02s

cmg 9.8m/s2

12

l B vB=



2 O B EP =



EK =



(3) EP

EK

3 44

1810 13 P =370 A M =0.25 B m A A sin370=0 .6cos370=0 .8g=10ms2
1 A 2 B A A B A

13 1916 M m v
2016 14 M R AB BC m A R A

C 1 C 2Mm

A

C

B 14

[]

15 4 60

4 2 0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 A BCD C CD C A AC AD BD B BD BC AB BD B 4 4 16



161

2 B

A

3

171

2 3

3 44 18 1A a

Mgsin Mg cos Ma

......2`

a g sin g cos 4 m/s2 ......2`



......1`

2B A AB

a a

ax a cos 3.2 ay a sin 2.4

......2`

B

mg N B ma y

......2`

NB = 7.6mN B A 19

......2`

......8`

......8`

20

[]1 mg2R



1 2

mvB 2

......3`

vB 2 Rg

......2`

mv B (m M )vc

......3` A

C

2m Rg vC M m

......2`

B

2

E



1 2

mvB 2



mgR



1 2

(m



m)vc 2

E M m mgR M m

......3`

......3`



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