Upload
panagiotis-asimeonoglou
View
214
Download
0
Embed Size (px)
DESCRIPTION
Γενική περίπτωση ανακύκλωσης
Citation preview
. roller coaster, . .
1. , . . , : .
: . . :
82:
2muF F W T F T mgR
= + = + = .
, . =0, :
22mumg u gR u gR
R= = = .
, u gR> .
, . (=0) :
W TK K W W = + 12 m2 1
2u m 2u m =
2 2 2
2
2 2 2
5 5
gh
u u gh u gR g R
u gR u gR
= + = +
= =
.
2. . . , . , >0 =0. :
2 21 1 02 2
K U K U I mg I + = + + = +l . Steiner. :
2 22 21 ...
12 2 3cmmI I md m m I = + = + =
l ll .
82:
:
221
2 3m l m+ g l 12
m=2l 2
2
3
6 6g g
= =l l
3.
. . . . =0 :
2muF F W N F N mgR
= + = + = =0:
22mumg u gR u gR
R= = = .
. :
F F W N F N = + = ( ) ( )
2
22
mumgR r
mumg u g R r u g R rR r
+ = = = =
r .
:
W TK K W W = +2 2 2 21 1 1 1
2 2 2 212
mu I mu I mgh
m
+ =
2 12
u + 25 m2 2 1
2r m 2 12u
25m 2 2r m =
2 2 2 2 2
2
2
7 7 20 20210 10 7 7
27 277 7
g R
u u gR u u gR u gR gR
u gR u gR
= = + = +
= =
r. :
W TK K W W = +2 2 2 21 1 1 1
2 2 2 212
mu I mu I mgh
m
+ =
2 12
u + 25 m2 2 1
2r m 2 12u
25m 2 2r m = ( )
( )( )
( ) ( )( ) ( )
2 2
2 2
2
2
2
7 7 210 10
207
207
27 277 7
g R r
u u g R r
u u g R r
u g R r g R r
u g R r u g R r
=
= +
= +
= =
28 ( 4.69 )
m r , . , h ;
: R=20 cm,
225
I mr= R .
H , . r r , , . : r = . , . . , (r
. :
( )
2 2 (1)02
min
0 ( ) 0
10 7 272 27 10
27 5410
mN m g g gR
R Rg h R gR h R R h R
h R cm
>
= =10
. .
29
. . , l , , . - , , .
, ;
2
12cmMI = l g=10m/s2.
( 2) . . 1, 2 :
)5(02
( )( )( )
1 2( ) ( )
2 21 2 2 1
2 2 2 2 22 1 2 1
2 2 22 1 2 1
1 (2 )2
2 933 2
9 9 (1)2 2
W B B W O OK K W W
I I Mg Mg
gM g
g g
= + + =
= =
= =
r r
l l
l l l
l l
84
2192g l .
2192g = l .
1.
, , . , :
(2)L L = .
85
, , (),
, L2=0.
1L M = l
. 1 2 (3)L L L L = + = l .
Steiner:
2 2 2
2 22 12 4cmM MI I M I = + = +
l l l
22
2 24
12 3MI M I = = ll
, : . :
21I M = l
2 22 4
3 3M MI M = + =l ll
1 , :
21
4 (4)3
L = l
(2) (3),(4) :
21 1 1
4 4 3 (5)3 3 4
M M = = =l l l l
(5) (1) :
(5)2 2
1 1
min
9 90 32 2
3 3 4 84 2 2
8
g g
g gL g
g
=
l l
ll l ll
2g
l
.