.


:




:

































 

 

 

 


. 4

4

 

: .

 

:

Ø ;

Ø ;

, , , ( ):

Ø

Ø ;

Ø ;

Ø ;

Ø ;

Ø ;

Ø ;

Ø ;

Ø ;

Ø ;

Ø ;

Ø ;

Ø ;

Ø

, , :

Ø ;

Ø ;

Ø .

, .

1.

R  
R
l
l

R

 

2

 

m J

 

 

 

 

 

Mz

 

 

 

 

 

 

dA = Fsds dA = Mzdφ

 

 

 

  1. l = 1 m = 100 , , 1/3 . (: J = 10-3 2.)
  2. R = 40 m = 1 , . (: J = 0,12 2.)
  3. l = 1 m1 = 1 m2 = 0,5 . , , l/3 . ( I = 0,09 2)
  4. R = 10 m = 5 φ = A + Bt2 + Ct3 ( = 1, B = 2 /2; = -0,5 /3). t = 3c. (: = - 0,1 ͷ.)
  5. n = 600 /. , N = 50 , . 31,4 . . (: 1) = 0,1 ͷ; 2) I = 1, 5910-2 2)
  6. , 120 2, n = 240 /. t = 3,14 . , . (: = 16 ͷ.)
  7. , , F = 40 , t = 5c 2,5 . (: m = 16 )
  8. R = 1,5 m1 = 180 n = 10 -1. m2 = 60 . , ? (: v = 0,942 /)

 

 

  1. , , l = 2,5 m = 8 , . ( ) J = 10 2 v1 =12 -1. v2 , . ( v2 =8,5 -1)
  2. m1 = 10 . , m2 = 2 . , . (: = 2,8 /2)
  3. R = 50 , m = 6,4 . , , = 2 /2. , . (: J = 6,25,12 2; 2) = 50 )
  4. m1 = 0,25 , ( ) m2 =0,2, . m =0,15 . μ=0,2. , : 1) , ; 2) 1 2 . (: =2.45 /2; 2) 1 = 1,1 ; 2 = 1,47 ).
  5. R = 30 m = 3 l = 5 α = 25. , 4,6 /.(: J = 0,259 2)
  6. , α = 30 , . , , , 30 . (: t = 0,585 )

 



<== | ==>
| . 8
:


: 2016-12-31; !; : 485 |


:

:

, .
==> ...

824 - | 746 -


© 2015-2024 lektsii.org - -

: 0.016 .