.
: .
(.1), , 1, 2. 3. 4, 5 6, 7.
, , L , .
, w a. m×V×L . :
m×V×L=I×w, 1)
I × w - , , I- , w - .
(1) Iw2/2. , a, h . ,
I×w2/2 = M×g×h, (2)
- . (1) w (2), :
. (3)
, sina a, .1, :
h = L×(l - cosa) = 2×L×sin2a/2 @ L×a2/2, (4)
, :
S =a×L.(5)
(4) (5) a, ,
h = S2/(2×L). (6)
h (3), ,
. (7)
(. 1-5-2), (= t /n, t - n ) I T:
. (8)
I (7), :
(9).
, :
D = m×V2/2 - ×g×S2/(2×L). (10)
1. L. .
2. . ( 10 ) 10 . 3 .
|
|
3. , S = X2 - X1. .
! ( ) 6.
4. : <S>, <m> <T>. (9) . Dm DS.
m, | Dm, | X1, | X2, | S, | DS, | t, c | =t/n, | DT, c | ||
1. . . 5. | = L = n = 10 |
5. (9) V. DV .
6. (10) ( ), , .. D/(mV2/2).
1. .
2. ? ?
3. ?
4. : , .
5. ?
6. ?