: .
: , .
. , . , mi ri 2:
, .(1)
, . , , .
. . , . , , , , . . .
: :
e = . (2)
. , . (. 1) d = sin a, . a , . = −mg∙a. , .
, (1)
. (3)
. , . (3), . ,
a = a 0sin(w t + j), (4)
, . , , T = 2 p /w.
|
|
. (5)
. (5)
. (6)
, , . . , : , . , b , .
. (7)
m 1, m 2 m 0 , , l 1, l 2 , l 0 .
, (6), , . , . , , . .
. (. 1) , (m 1 +m 2 + m 0) g m 1 gl 1 + m 2 gl 2 + m 0 gb.
. (8)
1. . . l 1, l 2 b, l 0 . . 1.
1
1 m 1, | |
2 m 2, | |
m 0, | |
l 1, | |
l 2, | |
l 0, | |
b, |
2. 220 .
. . . t, , , .
= t/ 10. . 2, . .
.
4. . < > . (8), , , .
, | 1, | 2, | 3, | < T >, | <J>, ∙2 | J, ∙2 |
2
5. < J > (6) < T >.
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6. J (7).
7. , . D J =<J > J .
8. J = < J > D J.
1. , , .
2. .
3. , . , .
4. . , ?
5. . .
6. . . ?
14