16-17
. . , .
: . ?
, .
, , , , , , . : , . . , . .
:
1) ;
2) ;
3) , .
, , 12 , 1 1 .
. , .
: , . , , .
?
1. .
2. , , .
: .
, .
, .
, . , , , , .
. , , . x . .
? ?
.
. .. , .
|
|
T =
[T] = 1
, 1, .
=
[ ] = 1 ()
, . .
2 .
, 2 , .
=
[ ] = 1 /
, , .
x=X cos t
, . Ÿ . , , . ? .
? .
, , , ? , , .
, , , . , .
= 2
, g. ?
, 9,8 / .
.
1. 99,5 30 . , .
l= 99,5 0,995 =
t = 1 60 T = 2c
N=30 = 2 = 4 g = ,
-?
g -? g = 9,81 /
: 2; 9,81 / .
2. : ; -; ; ; .
, , . 19- , , , . , : ! 1657 .
. .
, , .
- , ( ). . .
|
|
, , . . - . . : , , ? , , 帅
. , . , . . , , . : - , ? , : .
, , ! , , . . .
: , , :
x=0,4cos t. , . 0,5 .
________________________________________________________
____________________________________________________
- | - |
_____________________________ ______________________________ | ______________________________ ______________________________ |
(m) - ___________ ______________ ______________ [m] = 1 | () ____________ _______________ _______________ = t /N [T] = 1 c | (ν) _____________ ________________ ________________ ν = 1/T [ν] = 1 | (ω) ____________ _______________ _______________ ω = 2π/ ω = 2π ν [ω] = 1 / |
___________________
_________________________________________________________
= m cosωt
__________________
________________________________________________________
= 2π √ l/g