Eγχειρίδιον Περί Της Των Σφαιρών Χρήσεως Και Προκλου Περί Σφαίρας (Κωνσταντίνος Γορδάτος - Βενετία
Απαραιτ Περί Κύλισης Και Τριβής.
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Transcript of Απαραιτ Περί Κύλισης Και Τριβής.
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(. 4.5). . ,
dt ds, ds, d. cm
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1:
, R1=0,3m, R2=0,4m R3=0,5m , cm=6m/s =15rd/s, .
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cmr
cmr
cmr
i) . ; ii) 0,4m cm=6m/s
=15rd/s, . ;
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i) . cm - , -
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cmr
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=cm-= cm-R1=6m/s-150,3m/s=1,5m/s = cm-= cm-R2=6m/s-150,4m/s= 0m/s = cm-= cm-R3=6m/s-150,5m/s= -1,5 m/s.
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=cm+R
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cm=R=6m/s - =12m/s! cm=R!
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R1=0,3m, - cm=6m/s =15rd/s. V=1,5m/s. - ;
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cmr V
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=cm-= cm-R1=6m/s-150,3m/s=1,5m/s V=1,5m/s .
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3:
R=0,4m, , cm=6m/s =15rd/s. .
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=cm-= cm-R=6m/s-150,4m/s=0 m/s .
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10kg =s=0,5. F=60. .
i) . ii) ; iii) , 1=1s=0,1,
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= R2 g=10m/s2.
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i) . , 2 :
: F-=cm (1) : = R= R2 (2)
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. ( - ). cm=R cm=R (3) (1), (2) (3) , :
.s/m4s/m103602
M3F2
a 22cm =
==
= cm= 104=20. ; ( - ):
=s=sg=0,51010=50 , -
, 50, 20. 20.
ii) , . , , cm1 1 -
cm1=1R.
, F=cm2 F=cm2 -
(cm2=cm1+cm2t) , , , .
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=cm2-=cm2-1R=cm2-cm1=cm2t>0
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iii) i) , , , 20. - :
Fr
wr
Tr
Nr
Fr
r
2cmr
F-=cm
= cm
MF
aaMF cmcm 32
23
== +
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/=s1=s1g=0,11010=10 , , .
5:
10kg - =s=0,2.
F=15. 2s . .
, :
i) F. ii) F. iii) .
= R2 g=10m/s2, =0,6 =0,8.
:
i) i) - :
.s/m1s/m103152
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a 22cm =
==
= cm= 101=5. ; ( - ):
=s=sg=0,21010=20 F.
ii) F, - . , -
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iii) , - wx cm. -
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cm.
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( ): : wx-1 =cm (1)
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: = 1 R= R2 (2) cm=R cm=R (3) (1), (2) (3) , :
.s/m43
6,0102a 2cm =
=
= cm= 104=20. ; ( - ):
=s=sg=0,210100,8=16 20 , -
16.
6:
R 5kg =s=0,2. R ,
, F.
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= mR2. .
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F=F, .
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: F= F =cm MF
acm =
: = F R= R2 R
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MRF
a cm==
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Fr
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=cm-=cm-R =0 .
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