1. 156
37
1. F F F F F
4
1. F ʽ ʽ
2. F ʽ ʽ
3. F ʽ ʽ
4. F ʽ ʽ
2. ˀ A, B C ˀ A, B C F
5, 10 20 F ˀ A F
F 20 F ˀ C
F
1. 5 F 2. 10 F
3. 20 F 4. 40 F
3. F F landing gear F F
strut AB landing R F 16
strut AB 53.1 BC
1. 42.9 N/mm2
2. 52.9 N/mm2
3. 62.9 N/mm2
4. 72.9 N/mm2
4. 4 F F
4 F 32
6 F 24
4 F 24
7 F 28
F 4 F ˈ 5
F
1. 233 2. 237
3. 250 4. 300
5. F F F F F ˈ 450
F F F F F F F F
F ˈ 2,3,4,..., F F F
F F F F F
1. 30 2. 34
3. 39 4. 42
6. 3
4 F F 3 4
F F arctan 0.1 F 4 F F b 3
F 3 F a F
F F b F F F F
1. a
ab10
b))ba10(
−
−
+ 2. a
ab10
b))b10a(
−
−
+
3. ab
ba10
b))ab10(
−
−
+ 4. ab
bb10
))ba10(
−
+
+
7. F 500 F
200 28
F F ˈ
F F F F
F
ˈ
( / )
F
( F
F )
( C)
2250 4.2 100
F 850 3.5 78
1. 140 2. 210
3. 240 4. 310
8. F . F F A
3 F F . F
F F A 4 F F
F F F
1. 1 F 2. 2 F
3. 3 F 4. 4 F
A B
C

2. 157
9. 1 F F F F
F
F
1. 4 F 2. 16 F
3. 4 F 4. 16 F
10. F F R F F F A B
F
1. 1 F 2. 3 F
3. 4 F 4. 6 F
11. F ˂ ˂ F 100 W 120 V
F F F 1 F 2
ˈ 5 : 1 100% F
1 F F ˈ F F
1. F F F A
6
1 2. F F A
6
1
3. F F F A
6
1 4. F F A
6
1
12. F . F vo /
F F F
F F F 10 / 2
F . F
1. 1 2. 1.4
3. 1.6 4. 2
13. 2 F k1 , k 2
m F F
F m F F F
1.
m
kk
2T 21 +
π= 2.
21 kk
m
2T
+
π=
3.
21
21
kk
)kk(m
2T
+
+
π=
4.
m
kk
2
1
T 21 +
π
=
14. ˂
F F Vin F
vo ˈ F
1.
2.
3.
4.

3. 158
15. 4 F
F
4
3
F
ˈ
1. 25 2. 24
3. 26 4. 28
16. ˂ F A
F 200 F F F F
F ˂ 90 Hz F F F F ˂
F F F F 9 F
˂ A
1. 16.4 2. 8.8
3. 16.4 4. 8.8
17. F F F F ˂
F ˂ F
1. ˂ 2. ˂
3. ˂ 4. ˂
18. 0°C F 5 cm3
F F
F 20°C 500 cm3
F F
F F 5 °C F F
F F F
:
F = 0.8 g/cm3
F = 1 g/cm3
F = 4,000 J/kg K
F F = 280 kJ/kg
1. 25 F 2. 50 F
3. 230 F 4. 375 F
19. F F
F ˆˉ F 3 F
1 F 25 F
2 F 40
F F 210,000 F
F P F F
F
1. 4,000 2. 5,000
3. 6,000 4. 7,000
20. F F F F F F F 2.0
F 4 x 105
F F
F F F 5.0 F F F 1.0
F F F F 4 F
F F
1. 4 x 105
2. 3.3 x 105
3. 3.8 x 105
4. 4 x 105
21. F
F A F 10
F B F 20 F F
F 10 F A F
ˈ F 0.01 F
F g F 10 F 2
1. 2 / 2. 5 /
3. 20 / 4. 50 /
22. F F F
F F
F
1.
2.
3.
4.

4. 159
23. F ˂ 1 ˂ F
1. 0.25 A 2. 0.50 A
3. 0.75 A 4. 1.00 A
24. F F F F
. F F P
. F F X F 2
. F P/X F
.1 F F OUTPUT= NO F
.2 F F F .
. F X F F (P-1) F F
.1 F X = (P-1) F OUTPUT = YES F
.2 F X ≠ (P-1) F F X 1 F
F .
F F F ˂
F ˈ F F OUTPUT = YES
1. 60 2. 61
3. 62 4. 63
25. F A F M2
F F 100 kg
F g = 10 m/s2
1. kg)23(10M2 +=
2. kg)23(10M2 −=
3. kg)13(10M2 +=
4. kg)13(10M2 −=
26. F F
F ˈ 5
1. 261.5 N-m 2. 296.5 N-m
3. 3.42.5 N-m 4. 451.5 N-m
27. ˂
F F
˂ ˈ












=





2
1
2
1
I
I
3
2
3
1
3
1
3
2
V
V
F V2
1. 1 V 2. - 1 V
3. 1/ 4 V 4. - 1/ 2 V
28. F F AB
1. R
2
3 2. R
3
5
3. R
2
31





 + 4. R
2
51





 +
29. 3 F F F
F F
1. 2.

5. 160
3. 4.
30. F
F F F F ( F F
F F )
1. 2.
3. 4.
31. F F F
F F F F F F
1. F F
2. F F
3. F
4. ˈ F
32. 120 F
F F F F 90
F φ F F
1. 30 2. 37
3. 45 4. 53
33. F F ˂ ˈ
F F ˂ ˈ F F F
˂ F
1. 80 2. 85
3. 90 4. 95
34.
F
1. 250 g
2. A 55 g
3. B 105 g
4. C 60 g
˂ F ( )
0:00 8:00 1.50
8:00 12:00 2.00
12:00 16:00 2.50
16:00 20:00 3.00
20:00 24:00 2.00
˂ 150 g
A = 10%
B = 30%
C = 60%
A =?
B = ?
C = ?
˂ 100 g
A = 40%
B = 60%
* * F F
3
2
1
0
4 8 12 16 20 24
kw

6. 161
35. F
S = ˂ ( F VA)
P = ˂ ( F Watt)
Q = ˂ ( F VAR)
cosθ = (Power factor)
F F F P 30,000 watt
cosθ F 0.6 F
F cosθ F F F 0.8 ˈ F
F F F Q F F VAR
1. 22,500 VAR 2. 24,000 VAR
3. 17,500 VAR 4. 16,000 VAR
36. F F
F F
F F F
F F F
F ˈ F F
F F
F F
1. F F 98%
2. F F F
F F F F
F
3. F F
F
4. F F 15°C
37. F 20 ˁ A ˀ
1 F ˁ B F
ˀ 10 F ˀ F
ˁ A B F F F
= 3 x 108
m/s
= 331 + 0.6T m/s
T = (°C)
1. 3,430 m 2. 34,300 m
3. 1,996 m 4. 19,960 m
38. A 10 B 4
F
1 0.2 0.1
F 0.02 - 2
F B 2
B(g = 10 m/s2
)
1.
11
30 2.
11
30
2
3.
11
30
3 4.
11
30
4
39. F Ka HA HB HC
HA H+
+ A-
Ka = 1.0 x 10-2
HB H+
+ B-
Ka = 1.0 x 10-4
HC H+
+ C-
Ka = 1.0 x 10-5
F F F F F 1.0 x 10-3
M
F ˂
1. F ˂ HA > HB > HC
2. F ˂ HC > HB > HA
3. F ˂ F
4. F F
40. F F F F 10 m 5 m
25°C F F 1000 kg/m3
F
F F 50 °C F F
980 kg/m3
F F
F F F F (g) = 10 m/s2
1. 2.0 m3
2. 4.0 m3
3. 6.0 m3
4. 8.0 m3
41. F F F F F F 100
F F F F x F F
F 0 1 F F x ˈ F
F F F 0.5 F

7. 162
1. 0.1 2. 0.5
3. 0.8 4. 0.9
42.
I F 6A F F F 1 F
4A F F F 2 F
F F E ˈ F
1. 5 2. 10
3. 15 4. 20
43. F 20 . 20 . 10 . F
2 . F
1. 50 2. 100
3. 105 4. 210
44. ˂ F F
˂ F F F F 200 F
3,600 F 25
1 F F 1200
/ F F F 90%
F ˈ F 2 F
F F F F F F g = 10
F 2
1. 2.5 2. 5
3. 10 4. 15
45. F F
F F
F F (Simple Beam) (F)
F F F
ˈ
δmax =
EI48
FL3
δmax = (m)
I = Inertia factor =
12
3
bh
(
); (m4
)
E =
F E F F
106
F
1. 1.0 2. 1.5
3. 2.0 4. 2.5
46. F R ˈ F F
F F
1. 100 2. 150
3. 200 4. 250
47. F A, B C 10 kg, 20 kg 12 kg
F F F F
F t F B F
F C F F
1. 12 2. 12.5
3. 15 4. 15.5

8. 163
F
48. F ˈ
1.
2.
3.
4.
49. F F F F ( 1.33)
1. F 2.25 x108
F
2.
3. F F ˈ
4. F F
50. F F ˈ
F F 0 8
F F F
1. 3.75 / 2. 1.25 /
3. 0 / 4. 1 /

9. 164
37
1. F 4
2. F 1
3. F 2
4. F 1
5. F 1
6. F 3
7. F 4
8. F 2
9. F 2
10. F 4
11. F 3
12. F 4
13. F 2
14. F 2
15. F 4
16. F 2
17. F 3
18. F 1
19. F 4
20. F 2
21. F 3
22. F 2
23. F 2
24. F 2
25. F 4
26. F 1
27. F 2
28. F 4
29. F 2
30. F 1
31. F 3
32. F 1
33. F 1
34. F 4
35. F 1
36. F 1
37. F 1
38. F 2
39. F 1
40. F 4
41. F 4
42. F 2
43. F 3
44. F 1
45. F 4
46. F 1
47. F 2
48. F 4
49. F 1
50. F 3