2019年北京市普通高中会考物理试卷及参考答案

19
20
EP
1 kx2 2
k
x0
x0
x1
19
20
1
EP
2
k
3
2.0cm
h 21
C0
7
7
2019
3
45
1 2 3 4 5 6 7 8 9 10 11 12 13 14 14 15 15
ABAD C B BDC CDC B AAB B
33333333333333333
3
9
16 17 18 BC BD AB
7
2.5×1011J
5×109J
B t1>t2 D y1<y2
t1 y1
y2
-
1
y1
+
8
3
7
3
3
9
3
2
9
Fa 16 a b
ab b
q A Ea Fa
C
Eb
Fb q
17
Fa Fb
A Fa > Fb
C Fa
a
b
18
M
P
N
N
A
N
BM
N
CM N
DM N
a Fb
Ea Eb
ab +q
B
Ea
Fa q
D
Eb
q Fb
A
F
A
F
25
3-1
1-1
8
2018 11 19
F
F 16
E=1.0×104N/C
E A
17
1-1
r 1 2 3
18
1 2 3
m
M
G
F
3-1
S
B P m
8
MN q
MN O
U
MN
O
B
S L
P 18
P
O
L
L
MN
P
6
7
26 8
x0=5.0cm x1=5.0cm
h=1.9m
21
m=50g
x g=10m/s2
3
2
4
16
2
19
x
21 2
2T
2
20
22
2
22
4
2
0.8
2
2
2
1
4
23 24 7 25 26 8
30
23 7
1
a F 2.0m/s2 m
2 3s
24 7
1
x 1 at2 9.0m 2
qA
F qE 2.0 10 4 N
4
3
1
23
4
2
25
8
1
2
3
E
A
F
1
F G Mm r2
Mm
2
Fra Baidu bibliotek
G r2
m r
GM
r
3 23
r R
A 2.0 C 4.0
3-1 6
15
1-1
B 2A 0.01s D 4A 0.01s
S
R
B3 D
0 0.01
0.02 0.03 t/s
-2
5
E=3.0V 1.0A
R
Er
S
6
5×109J/m2
2000h
2020 2.5×1011W
A.
B.
C.
D.
2020
3-1
8
1
2 2> 1 t2
A t1=t2 C y1=y2
S
2
2
4
4
3
3 2
2
4
25 8
1
2
3
26
1
8
2
3
23
qU 1 m 2 2
2qU
3
m
r
2
qB m r
r 1 2mU Bq
L 2r 2 2mU
3
Bq
2 L
MN P
qmUB 2
23
EP=mgh =0.95J
2
1 2
kx12
mgh
k=760N/m
2
Ek
=
1 2
kx12
mg x1+x0 ) S= d )2 2
3
4
C Ek =2.9×103J/m2
2019
1
2
7
54
3
2B
2B
4
18
8
46
54 15
3
45
1
A
B
C
2
A
B
C
3
A
B
C
4
A
B
C
5
A
B
C
6
1
F1 =3.0N F2 =4.0N A 1.0N
F1 F2
B 5.0N
C 7.0N
D 8.0N
7
2
A2
B4
C6
8
2
L=0.10m
I=1.0A
F=0.02N
A 0.02T
B 0.04T
C 0.1T
D 0.2T
a=________m/s2
0
5 10 15 20 t/s
14
15
___________
_________________________________
15
5
7
4
23 24 7 25 26 8
30
23 7
16
1
2
3.0s
24 7
17
q=+2.0×10-8C
1
A
2
m =4.0 kg F=8.0N a x
D
D
D
D
D
F1
O
F2
1
D8
××× ×
F
××× × × ×I × × ××× ×
2
1
7
9
A
B
C
D
10
3
A Fx C Fx cos
F
x
F
B Fx sin D Fx tan
F
F
x 3
11
A
C
12
A
B
13
A
B
C
D
4
B D
C
D
2
7
14 15
1-1
3-1
14
1-1
5
i/A
i
t
2
A 2A 0.02s
C 4A 0.02s
ab 9
B Fa < Fb
D Fb
b
a
N
10
M
P
M N
N
10
4
7
4
19
11
46
4
16
_________ C
ABC
11
12
T
AC
x
A
AC=_________
A
B
C
x 12
20 13 _________ _________
21
0 5s
22
ab
a
b
ab
13
/(m·s-1)
t
14 4
m=________m/s 2