3.1 1 , .
3.2 , , , , : , . .
3.3 , , .
1. , S = At + Bt2 + Ct3, 5 . : = 2 /; = 2 /2 = 0,1 /3.
:
S = At + Bt2 + Ct3 S = f(t),
t = 5 c .
A = 2 / 1) x
B = 2 /c2 S?
= 0,1 /3 , .
υ -?; a -? 2) ?
x = x0 + υ·t;
x = x0 + υ0t + .
3) t?
υ0 = A ;
a 0 = 2B .
x0, υ0, a 0 , t = 0
= f (t), ′ = f (t), ″ = f (t).
4) t = 5 c?
= x′ = A + 2Bt + 3Ct2, a = ′ = 2B + 6Ct.
, :
= 29,5 /, a = 7 /2.
: 29,5 /; 7 /c2.
2. = 3 + 4t - t2, . , 4 . ?
, , :
S = ∑|∆r|.
, :
′ = 4 2t = 0, t = 2 .
, 2 .
S = |Δr1| + |Δr2|,
Δr1 t = 0 t = 2 ;
Δr2 t = 2 t = 4 .
Δr = x2 x1 = 3 + 4t2 t (3 + 4t1 t ) = 4 (t2 t1) (t t ) =
= [4 (t2 + t1)] (t2 t1),
Δr1 = [4 (2 + 0)] (2 0) = 4,
Δr2 = [4 (4 + 2)] (4 2) = 4,
Δr = Δr1 + Δr2 = 4 4 = 0.
, 4 = 0 = 3 .
S = 4 + |4| = 8.
: 8 ; t = 2 .
, .
|
|
3. 1500 . , ? 300 /. 800 .
:
D = 1500
υ0 = 300 /
h = 800
α -?
, ( ).
, , t = . .
υy = 0, ,
. , ,
. , .
:
.
,
: = 85o18΄.
, . ,
,
,
, , ( ), , a2, .
: 8518΄.
3.4 , , . :
- , ;
- ;
- , ;
- ;
- ( );
- , () ;
- , ;
- .
4. , 30 . S = At + 3Bt , B = 0,42 /c2. .
:
a = 300
S = At + 3B
B = 0,42 /
m .
OX: m a = mgsin .
OY: O = mgcos N.
N = mg cos , m a = mgsin mgcos . a = = 6. ,
; .
: .
3.5 , . , , , , . , , .
, , , . , , , .
5. 25 , 54 /, 300 . 10 , 800 /, 3·10-3 . ? 80 ?
|
|
:
m1 = 25 25·103
1 = 54 / 15 /c
a = 30o
m2 = 10
2 = 800 /
Dt = 3·10-3
m3 = 80
D -? F -?
- .
,
.
, :
.
,
.
.
, . , .
, : .
D 3 = D ( ),
.
? F .
: 0,27 /; 7,2 .
3.6 , . , . , , , . . () , .
6. j = + Bt + Ct2, = 1,5 /2. 20 . 6 . , .
:
= 1,5 /2
R = 20 0,2
F = 6 H
m -?
,
, ,
.
. ,
.
.
, :
,
= 20 .
: 20 .
7. 70 200 1,5 . , . , 2 /? , .
:
m1 = 70 - -
m2 = 200 : -
R = 1,5 ,
= 2 /c ,
ν1 = 0 ,
.
0, L1 L2:
.
, , .
L1= L2, , .
.
, , , ,
, / = 8,9 / = 0,149 /.
: 0,149 /c.
8. 80 1 , 20 /. . , , , 2,94 0,98 2. .
:
m = 80
R = 1
2,94 2
= 0,98 2
= 20 / 0,33 -1
-?
:
( + ) = ( + ) ,
( m ) 2 = () 2 ,
0,39 -1.
|
|
ν2 = 0,39×60 = 23,4 /.
: = 23,4 -1.
|
:
d = 6 = 6×
4 \c
m = 0,25
A -?
, R:
= d. .
= .
I = m = m = .
.
:
.
0,7×0,25×3,142×42×(6×10-2)2 = 0,1 .
: A = 0,1 .
3.7 - , , . . , . - . , (, , ), .
10. 10 . 7 0 5 , 17. ?
:
V = 10 10-2 3 , , -
T1 = 7 0 280 m1 m2 -
p = 5 5.106 1 2:
T2 = 17 0 290 .
M = 29.10-3 / m1 m2 ,
p1 = p2
.
. , , .
.
,
.
: 2,26×10-2 .
3.8 . , , () , . , , .
, , , , , . Q, .
11. , . V1 8 . () 1 2 1,5 0,124 . , , .
:
1 = 2 1 2
1 = 8·106
V2 = 1,5V1 = 0,124 1,24·10-4 3
-?; ΔU -?; ΔQ -?
0 V1 V2 V
,
.
:
.
i = 5, = .
, ,
.
: 331 ; 827 ; 1158 .
1
|
|
. . , , - 4, 4, .
1
1.1
S = At + Bt2 + Ct3, = 2 /, = 3/2, = 4 /3. , , 2 .
1.2 10 , S = A - Bt + Ct2, = 1 /2. .
1.3 1 S = 8t - 0,2t3. , , 3 .
1.4 , 18 /, 10 = t3, = 0,01 /5. .
1.5 S = A + Bt + Ct2 + Dt3, = 0,14 /2 D = 0,01 /3. 1 /2? .
1.6 2
= 10 + 5t 10t2?
1.7 , 100 . S = 100 + 10t 0,5t2 . , , .
1.8 , 20 . , , S = t3 + 4t2 t + 8. , 3 .
1.9 1 S = 8t 0,2t3. , , 3.
1.10 4 . = 8 2t2. , 9 /2, , .
2
2.1 V0 . 2,2 . ?
2.2 10 / 400 . ? ?
2.3 , , 0,5 1,5 . ?
2.4 10 /. 3 .
2.5 V0 α . V0 α, , 3 3 .
2.6 15 / 300 . , , , .
2.7 20 / 300 . , 1,5 .
2.8 40 20 / 450 . , . ?
2.9 20 10 / 600 , , . ?
2.10 5 /. , 2 .
3
3.1 , 45. 36,4 , 2 /. .
3.2 1 , 0,1 . , , 1 25 .
3.3 , 45.
|
|
S = Ct2, = 1,73 /2. .
3.4 , 8 , . , , , .
3.5 2 1 . , , . .
3.6 500 . , : ) 2 /2; ) 2 /2.
3.7 500 700 . 6 . , .
3.8 2 5 /2. .
3.9 , 30, . , 0,15.
3.10 1 15 . 0,05, , 2,5 /, 6 .
4
4.1 5 5 600 /. .
4.2 , 3 /, 20,4 . .
4.3 100 , 520 /, , 10 , . , : ) ; ) 36 / , ?
4.4 60 , 8 /, 80 , 2,9 /, . ? , ?
4.5 2 , 1 /. , .
4.6 5 , , 300 /. , 3 100 /. .
4.7 150 2,8 . 90 . , , .
4.8 2 . 8 . , , , 450 /, 30 .
4.9 , 3 /, . 10 . . 10 60 . , 2 .
4.10 , , 45 . , 480 /. 18 , 60.
5
5.1 , 15 /, 20 /. , , 8,7 .
5.2 30 /. 20 . , ?
5.3 , ,
20 , , 2,94 /.
5.4 20 1 , 81 . , , , .
5.5 100 , 11 30 /? 0,22, 46 /.
5.6 10 0,5 , 30 /. .
5.7 , , 100 ×/ 500 . .
5.8 600 0,3 1 18 . 0,01. .
5.9 5 2 2. .
5.10 20 . , , .
6
6.1 , 30 , 15 . ?
6.2 , 10 /. 1 .
6.3 , ,
20 / 10 . .
6.4 , , , , 2,5 , 5 .
6.5 2 /2. 0,5 13,6 /2. .
6.6 10 , , 30 . 4 .
6.7 600 /. , 50 , . 31,4 . .
6.8 ,
150 ×2, 240 /. 1 , , . , .
6.9 60 , 2 . , , , 3 9 /.
6.10 , , 12 -1, 8 . 30 , 6 . .
7
7.1 , 5 -1,60 . .
7.2 10 , , 2 -1.
7.3 , 9 /. 78 , 3 . .
7.4 2 4 /. .
7.5 , 10 0,1 , 120 -1. 10 . , .
7.6 600 /. , 50 , . 31,4 . .
7.7 0,8 6 60 . , 0,5 ? 0,4 . 5 /.
7.8 . 4 /. , , ? 5 ×2.
1,8 6 . , .
7.9 3 180 . , 70 1,8 / ?
7.10 , , . . , , , ( ) ? 280 ,
80 . .
8
8.1 , ( 7 ), ( 3 ). .
8.2 2 6 4 127 . .
8.3 430 /. .
8.4 10 10 . , 2,5 ? .
8.5 1,33.10-9 ; 15 . .
8.6 50 27 . , 1×105 . . .
8.7 300 1,2×105 1 /3. .
8.8 300 106 15 /3. .
8.9 0,8 3 2 2,9 . , 27 .
8.10 , , 0,1 , 56 . , 5×105 ?
9
9.1 10 , 17 , 860 . ?
9.2 20 3116 . ?
9.3 6,5 , 27 , . , , .
9.4 20 32 . 28 .
9.5 , 0,20 27 .
9.6 , 0,20 27 .
9.7 10 , 8×1010 -3. .
9.8 500 .
9.9 10 290 . . .
9.10 56 64 . , 20 .
10
10.1 .
80 % , , . 6280 . , .
10.2 , 0,25 , . , 400 .
10.3
1000 . 500 , 300 . , .
10.4 , , 2,94 13,4 . .
10.5 , 0,4. , ?
10.6 , , 70 % , , . , , 5 . , .
10.7 . 5,5 . .
10.8 , 0,4. , 400 .
10.9 .
500 , 300 . 2 . , , .
10.10 , 4 . .
1
, , , , , , ,
1 | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 | 1.10 | 1.1 | 1.2 |
2 | 2.6 | 2.7 | 2.8 | 2.9 | 2.10 | 2.1 | 2.2 | 2.3 | 2.4 | 2.5 |
3 | 3.9 | 3.10 | 3.1 | 3.2 | 3.3 | 3.4 | 3.5 | 3.6 | 3.7 | 3.8 |
4 | 4.2 | 4.3 | 4.4 | 4.5 | 4.6 | 4.7 | 4.8 | 4.9 | 4.10 | 4.1 |
5 | 5.5 | 5.6 | 5.7 | 5.8 | 5.9 | 5.10 | 5.1 | 5.2 | 5.3 | 5.4 |
6 | 6.8 | 6.9 | 6.10 | 6.1 | 6.2 | 6.3 | 6.4 | 6.5 | 6.6 | 6.7 |
7 | 7.1 | 7.2 | 7.3 | 7.4 | 7.5 | 7.6 | 7.7 | 7.8 | 7.9 | 7.10 |
8 | 8.4 | 8.5 | 8.6 | 8.7 | 8.8 | 8.9 | 8.10 | 8.1 | 8.2 | 8.3 |
9 | 9.7 | 9.8 | 9.9 | 9.10 | 9.1 | 9.2 | 9.3 | 9.4 | 9.5 | 9.6 |
10 | 10.10 | 10.1 | 10.2 | 10.3 | 10.4 | 10.5 | 10.6 | 10.7 | 10.8 | 10.9 |
, , , , , ,
1 | 1.10 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 | |||
2 | 2.10 | 2.1 | 2.2 | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | |||
3 | 3.10 | 3.1 | 3.2 | 3.3 | 3.4 | 3.5 | 3.6 | 3.7 | 3.8 | 3.9 | |||
4 | 4.10 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 | 4.6 | 4.7 | 4.8 | 4.9 | |||
5 | 5.10 | 5.1 | 5.2 | 5.3 | 5.4 | 5.5 | 5.6 | 5.7 | 5.8 | 5.9 | |||
6 | 6.10 | 6.1 | 6.2 | 6.3 | 6.4 | 6.5 | 6.6 | 6.7 | 6.8 | 6.9 | |||
7 | 7.10 | 7.1 | 7.2 | 7.3 | 7.4 | 7.5 | 7.6 | 7.7 | 7.8 | 7.9 | |||
8 | 8.10 | 8.1 | 8.2 | 8.3 | 8.4 | 8.5 | 8.6 | 8.7 | 8.8 | 8.9 | |||
9 | 9.10 | 9.1 | 9.2 | 9.3 | 9.4 | 9.5 | 9.6 | 9.7 | 9.8 | 9.9 | |||
10 | 10.10 | 10.1 | 10.2 | 10.3 | 10.4 | 10.5 | 10.6 | 10.7 | 10.8 | 10.9 | |||
, , , , , , ,
1 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 | 1.10 |
2 | 2.2 | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 2.10 | 2.1 |
3 | 3.3 | 3.4 | 3.5 | 3.6 | 3.7 | 3.8 | 3.9 | 3.10 | 3.1 | 3.2 |
4 | 4.4 | 4.5 | 4.6 | 4.7 | 4.8 | 4.9 | 4.10 | 4.1 | 4.2 | 4.3 |
5 | 5.5 | 5.6 | 5.7 | 5.8 | 5.9 | 5.10 | 5.1 | 5.2 | 5.3 | 5.4 |
6 | 6.6 | 6.7 | 6.8 | 6.9 | 6.10 | 6.1 | 6.2 | 6.3 | 6.4 | 6.5 |
7 | 7.7 | 7.8 | 7.9 | 7.10 | 7.1 | 7.2 | 7.3 | 7.4 | 7.5 | 7.6 |
8 | 8.8 | 8.9 | 8.10 | 8.1 | 8.2 | 8.3 | 8.4 | 8.5 | 8.6 | 8.7 |
9 | 9.9 | 9.1 | 9.1 | 9.2 | 9.3 | 9.4 | 9.5 | 9.6 | 9.7 | 9.8 |
10 | 10.10 | 10.2 | 10.2 | 10.3 | 10.4 | 10.5 | 10.6 | 10.7 | 10.8 | 10.9 |
, , , , , , , ,
1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 | 1.10 | 1.1 |
2 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 2.10 | 2.1 | 2.2 | 2.3 |
3 | 3.6 | 3.7 | 3.8 | 3.9 | 3.10 | 3.1 | 3.2 | 3.3 | 3.4 | 3.5 |
4 | 4.8 | 4.9 | 4.10 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 | 4.6 | 4.7 |
5 | 5.10 | 5.1 | 5.2 | 5.3 | 5.4 | 5.5 | 5.6 | 5.7 | 5.8 | 5.9 |
6 | 6.2 | 6.3 | 6.4 | 6.5 | 6.6 | 6.7 | 6.8 | 6.9 | 6.10 | 6.1 |
7 | 7.4 | 7.5 | 7.6 | 7.7 | 7.8 | 7.9 | 7.10 | 7.1 | 7.2 | 7.3 |
8 | 8.6 | 8.7 | 8.8 | 8.9 | 8.10 | 8.1 | 8.2 | 8.3 | 8.4 | 8.5 |
9 | 9.8 | 9.9 | 9.10 | 9.1 | 9.2 | 9.3 | 9.4 | 9.5 | 9.6 | 9.7 |
10 | 10.10 | 10.1 | 10.2 | 10.3 | 10.4 | 10.5 | 10.6 | 10.7 | 10.8 | 10.9 |