I.
.
. , , .
. , , .
. , , .
1 2, 3 4. () 5. M , .
6, . , .
4 ( M, m) : g(M + m) T 2. :
. (1)
3 ( M) :
. (2)
. (3)
, , ,
. (4)
(1), (2), (3), (4) :
, (5)
. (6)
II.
, , . .
1. .
1. 2 3 4 , .
2. 6 , , ( , , ). .
3. 5 ( m). . , , . . , .. . , 5 . . 1. < t >.
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4. , ( ) .
5. , :
,
S , ; t - .
6. 3-4 , . .
7. . 2 6 .
8. (6).
. 1. . .....
/ | m, | S, | t 1, c | t 2, c | t 3, c | t 4, c | t 5, c | t , | a, /2 | a , /2 | g, /2 | g , /2 |
2.
:
, (7)
x 0 - , x - .
, (8)
v 0 =0.
(7) (8) .
1. , S v 2.
2. v 2(S). , , .. (8). . .
3. .
:
åFiy , åMi .
1- . .
. OY F 1, F 2,
1- . ( 15 ). m , OY F 1= mg. , m 0 , .. m 0<< m - m 0.
|
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F 1= mg. S . :
2- . , , m0 . F 2=(m - 2 m 0) g. t
. 2.
/ | åM, | S, | t1, | t2, | t3, | t, | a=2S/ , /2 | a1/a2, | F1/F2, |
0,121 | 0,32 | 1,12 | |||||||
2- . F const, ..
F.
.
1- . . , 1- .
2- . m 1 . 2 m 1,
M = M = M ,
m ,
2 m 1
3.
. 3.
/ | F=mg | S, | åMi, | t1, | t2, | t3, | t, | a=2S1/ , /2 | a1/a2, | åMi2/åMi1, |
.
III.
1. ?
.
2. , ?
3. , ?
4. .
5. .
6. 3 2. ? ?
7. ? ( ), ?
8. .
9. 5 4.
10. , ( )?