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Φυσική Γ’ Λυκείου Μηχανική στερεού σώματος2lyk-el-kordel.thess.sch.gr/autosch/joomla15/images/physics/stero... · Φυσική Γ’ Λυκείου
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- 1
(. ).
( ).
.() .()
(
)
R .
.
.
.
,
.
, 2 2
.
=
.
u
2
R
.
-
2
.
:
0 t .
. (+) (-)
.
= 1
2
2
. (
)
.
at
,
.
, ucm = 0.
2
=
2 s
.
0t
( )
2
0
2
( ).
.
-
3
.. :
) ( . () , .()
. (), . () ,
(), , . ().
) . ()
(1) (2)
.
) ()
) to ()
) t1 (E)
-
4
x (m) (rad) x=r u ( m/s) (rad/s) u=R cm (m/s2) (rad/s2) cm=R
. . ucm=dt
dx cm= dt
du
ucm= ,
cm = .
F =0 cm = 0
x = ucm t
F 0, F = m cm,
ucm = uo cm t , x = uot 2
2
1tacm ,
cm
o
ola
ux
2
2
cm
o
a
ut ( )
. dt
dsu .
dt
d
u =
u
. .
=
(
. .)
r
uak
2
( . . .)
t
aaa k
dt
da
=
t
t &
2
2
1tat
-
5
:
.
. () ()
() (), () () .
( )
( )
( )
.
.
.
.
-
6
.
,
.
1 , 2 , ,
.
=1+2++
(..
) .
.
.
( = 0) :
o
o .
..
,
:
o
o
o
-
7
( = )
.
:
1.
. ..
.
Oxy.
2.
.
3.
.
4.
,
Stainer.
5.
.
-
8
.
-
F 0 0
F = mcm
cm 0 cm t ,
cmcm
u
t
2
0 cm
1x t t
2
= , 0 t ,t
ucm = R cm = R
F 0 = 0
F = mcm
cm 0 cm t, cm
cm
u
t
,
2
0 cm
1x t t
2
F = 0 0
=
0t ,
t
F = 0 = 0
-
9
.
.
( )
r
, L m r .
= I
.
:
) L = . ) L=L1+L2+= 1+2+
.
,
, .
L
dt= = .
=
.
, ,
dt
dL
-
10
t= ,
.
.
= ,
.
.
, ..
,
. :
.
1( ) + + ( ) = 1( ) + + ( )
=0
. . .
dt
dL
-
11
FW
.
.
, .
( ).
,
.
:
=
=
=
:
=
=
=
: Ft
.
t .
(...)
.. .
.. .
-
12
m
U, ,
, o
U = mgh, h
(U = 0).
. ..
.
() , ,
( ,
, (-).
(1) (2) (1) = (2)
= U++ 3
.
-
13
-
:
I. -
( -y).
II.
..
.
,
.
III. . ,
.
a.
b.
c.
d.
IV. ,
.
-
14
,
.
()
:
1.
.
..
.
2.
Oxy.
3.
.
4. , Fx=0 Fy=0
=0 .
5. ()=0
.
,
() = 0 .
.
-
15
-
16
-
17
.
= ,
t ,
.
(.. )
-,
.
.
(
)
.
o
.
o
0 t 2
0
1t t
2
.
o
.
o ()
.
=0.
-
18
.
.
o
.
o
.
.
.
=
=
()
= =
= (T1 T2)R =
.
F = ma = ( =
= ( =
.
.
-
.
.
-
19
o ( )
.
1 2.
= 2 F1 =
ma F2 = ma = 1 & =
2. .
-
.
:
= =
: = =
.
,
.
(uo = 0 & o = 0 ).
:
uo= ucm-R . ucm = R
o= cm - R . cm = R
.
.
( )
,
.
-
20
( )
.
,
,
.
.
,
.
,
acm ,
. , R , ,
.
o
(max) . :
< (max) < sN
o , :
cm = R , acm = aR
o , :
cm = R , acm = aR =
,
.
mg
R
.
-
21
, ,
. ,
,
.
,
.
mg ,
TR
. ,
,
. ,
, .
o
wx
.
o
.
o cm
1. m
2. R
3. s
4.
.
.
o .. ,
.
o
.
o ,
(. )
(...).
-
22
o ...
,
.
,
0 .
=0 w=F.
