Ερωτήσεις...
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03-Dec-2015Category
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ΑΕΝ, Μηχανική. Ερωτήσεις κατανόησης
Transcript of Ερωτήσεις...
-( )
: 9, 13, 21, 23, 30, 31, 32, 37, 39, 40, 41, 49,
51, 61, 62, 64, 69, 70, 76, 80, 81, 82
1. =-4 +3 = (4, 3) = 3 2 = (3, 2).
= + 2, . .
2. , ;
3. ; .
4. , ;
5. , ;
6. , ( ).
7. .
8. ;
9. X Y , , :
10. ;
) =
) = 3 + 2
) =
) = 5 2
) = +
11. , 7 3 .
= + ;
Y
A
Y
A
12. 5.49m 7.65m. ,
(. 9.416m, 35.67o, 54.33o)
13. 1=30.5
, 2=135.3, =3.5cm,
B=7.9cm.
= + (. 7.78cm) (:
)
14. y=f(x),
y,
y
x y=x,
.
,
.
,
, ; ; (. =-7.5)
15. ,
, x(t).
,
;
16. ,
, x(t).
,
;
17. , ,
;
18. x , Km, min.
, :
) t=0.4min t=3.8min
) t=2.5min t=6.1min
) t=2min t=3min.
d) t=2.4min , 7min
) t=7min t=6min
)
) .
19. x(t), (t), (t) :
20. (t) . ;
t1;
21. ; t=2sec t=5sec; (t).
; 0-7sec;
22. , . , , (
), A, B ,C, D
E, .
23. xx x x(t)= t 5t 6 (S.I) )Y , (t) (t)
) ;
) x;
) , ,
0, 2, 4, 6 8 sec.
) (t) (t), 0 8 sec
24. 6 , 1 2 ,
t1 t2 , t1< t2.
+ = , .
25. = 0 , , . .
26. . , ;
27. , H , . 2 .
.
28. . .
) , y,
.
, ,
: , , g; ,
;
) ,
y .
) , y
0, .
) =10m/s, =6.25m, g=10m/s2
, . (. 2.5s, 2.5m/s)
0
y
H
29. (t) : ) 1
) 2, 2> 1 ) ( )
) 3
, . .
30. , . .
) t. , ,
Hmax. Hmax.
) t,
.
,
31. , . ,
; .
32. x
.
) (t)
)
0 5s
)
x, 0 5s;
(. 5.5m)
33. , ,
t1 t2
t2>t1.
.
34. t1 t2 t2>t1.
+ =
35. , , vo,
.
;
.
: vo=10m/s, =60 (. 5m/s)
36. , 2
, .
+ = . ;
37. , =40 ,
vo=30m/s. :
t,
t, hmax
,
. . g=9.8m/s2 (. 1.97s, 3.94s, 18.97m, 30m/s, 90.5m)
38. | | = | |, .
;
. .
39. H, ,
D.
) ,
, D g.
)
.
: H=20m, D=8m, g=10m/s2. (. 4m/s, 20.4m/s, 78,7o )
40. : x = 4t + 3t + 15, y = 12 2t. (S.I.) , , t=0s t=1s. : , , ,
,
41. : , .
.
42. .
2 to . (..
==5m/s). , (),
tA tB.
43. . ) ,
) ,
) ,
, r1=1cm r2=12cm
44. .
) 1 2
) 1 2,
45. , ( ):
)
)
)
)
)
)
)
)
)
)
46.
) ) , . ) , . ) ,
47. 120 1min.
;
48. A 4z,
49. 20z. O 0,5s
50. ; , ;
51. , R>RA. ; ) . ) , . ) , . ) .
52. =18,74rad/s. , , 1,7 . ) , ) ; (. -3,0610-3 rad/sec2, 9130) ( : =+t =+ t+t
2/2)
53. , . . , , C D;
54. m . T, : )
)
)
)
) g.
55. B=mg, .
56. T . .()
57. m, . . 3 , -;
58. =5Kg =3Kg F=12N. . (. 1.5m/s2, 4,5)
59. , F , . (. 1.5m/s2, 7,5)
60. m=5kgr ,
. , , . ) , . (. =m(g+), T=m(g-)) ) , , =60N; (. =2m/s
2) ) ; (. =g) g=10m/s2
61. , 3.28Kg F=13.4 =30 . 4.9s, t=0 ; . (. 17.34 m/s)
62. , 1.58m/s. 1.7s 7.02m/s. ; g=9.8m/s2
(. 19.1)
63. Atwood , , . MA . , , g, g .
(.
)
64. 1.27Kg
, 1.4m. , 11.7m/s. , . g=9.8m/s2 (. 136.62)
65. m1 = 2 kg m2 = 3 kg , , , . ) ) g=10m/s2 (. 6m/s2 , T=12N)
66. 2kgr F=20N. 3m/s2, . g=10m/s2 (. =0,7)
67. F. F ( , ), ) . ) . ) . >
68. , ,
F. t F1 ( ). t , : ) ) ) )
69. m1=2kgr, m2=1kgr. m1 =0.2. F, m1, m2 =1m/s2, . g=10m/s
2 (. F=17N, T=11N)
70. , r=100m. 108km/h, , . g=9.8m/s2. : i) 1 ii) 0.7 (. 0.92)
71. m=1.35Kg L=0.59m. , . =57.3, , ; (. 5m/s)
h h/2
v = ?
L vo=0m/s =4m/s
72. . ; , , ; ;
73. =100 h=0,4m , t=50sec. .
74. . ;
75. . ) , . ) , , ; .
76. ,
( x), . , 0 2xo, Fo=5N xo=2m. (. 30J)
77. , m1>m2, ,
. ; ; .
78. h
. , , 2; (. 4h)
79. , (=). ; ) ) ) , ) )
80. = 2000N = 2m/s. ; ( . 4kW)
81. L h. h/2. . . g=10m/s2 h=1.6m (. 4m/s) ( : )
h
=0
82. m, , . , , 1 2
. , (W = F dr), 2 : ) ) ,
83. , 60W 125W. Kcal(1 Kcal=4,186KJ). Kcal() , 92W; (. 1898,9Kcal)
