prépa devoirs n°1.pdf
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7/29/2019 Prpa Devoirs n1.pdf
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1 : d2(V2) = 20cm 1200tr.min-1
. 1. .2. 1 d1(V1) = 10cm3 (V3)
d3 = 30cm. .2
.I( g=10m.s-2) :
(P) r =5cm () ():J. (S) m=500g =30 .(f) . (S) A . AB=50cm,vB=2m.s-1.1. ((S AB....(S),.2 T (S), ..J,(...(P.3.II (S) B ,(S) BC .CvC=0,6m.s-11. (S) BC .2. .BC=40cm.3 CDD (S).
.III , M=-2,24.10-3N.m. n .n.3
((C m=10kgv=4m.s-1 : F 40N :r=4cmR=10cm.f1f2 .1. F x (C) z. zxrR.2. F (C) md 12.3. (C) ..4 M. .5. t f2 F. 1.40 srad. J ().
4
m=500Kg((s OAB :-OA 1m =30 .-AB r=0.5m C.1- ((s O t=0 F OA F=2,1N A
.VA=2m/s1.1. .1.2. ((s A..1.3 F (s)OA .
-2 A F. ((s B .1.2. ((s AB.2.2. ((s .AB.2.3 . :110 . / 30 / 30g N Kg
-1-
2
O1O2 O3
d3d2d1
(S)
(P)
A
B C D
.
f1R
r
f2
F
(C)z
x
o
A
B
C
(S)
F
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7/29/2019 Prpa Devoirs n1.pdf
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5
(P1) -cmrr
r 10;2
'
gm 100)( 12.2
1
1
rmJ
(P2) -cmr 10
gm 100)( 22.
2
12
rmJ
(S) -gm 50'
-(f1)(f2).
00 t(S)O
112(P1)(P2)rv(S)
2 )();();( 21 PPSmrv3 )();();( 21 PPSvz(S)4v(S)
1tmz 5,0
1
1
251T(f1)2T(f2)
6 ((S m=50g A () D AB I r =2m.BC .CD =30 .
1. AB BC.1.1.(S) M rg.1.2.vB(S) B.1.3. (S) BC1.4. BC t = 20s.
2. CD, f=0,2N. CD.7 m1, ,(S) gm 100 . .
CO 3
2.( ). 45 ). ) C, .
.1 . .2. 0V .3. .4. V. minV .
8
r1r2:r2=3r1=12cm. S1S2 m1=0.4kgm2=0.1kg .
-1 .-2 =20rad/s.
1.2- V1V2.2.2- :h=5m.
-3.2 .-4.2 m1m2r1g .g=10N/kg
-2-
P2
f1
f2P1
O
1 2
z
A
M
B C
D
I
(S)
'
C
(S)
S1
S2
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9
(S) m=100g ABCD :*AB .*BC =30.CD* I r =10 cm.1- AB, .
1-1: .1-2: .1-3: F AB, :NF 6cmAB 40.1-4: AB . 1-5: AB2- B, F. .BCD
2-1: BC.:2-2 .BC=60cm2-3: CM mgr.2-4: CD.:g = 10N/Kg
10
((S m = 400 g, 50 % . (S) r = 10 cm . , .( (1))
OA g = 10 N/kg N = 40 ms :-1 .-2 .-3 t = 8s. .4- ..((S-5 ((S .:t = 8s6- (S) .7- T :sin..gmT .8- .t = 8s((S:Wm-9 t = 2,5s.
-10 Pm t11
LV 710.2,5 ..1 mh 50.2. , : .
2.1. ..2.2 f :vf .
17.10.7,1
skg. f 1.10 smv. .
3. .3.1. ..3.2 12 m275. . .
3.3. st 121 st 182 ..3.4 3.5. .3.6. f st 121 st 182 . : 33 .10 mkge, 3.3,1 mkga,1.81,9 kgNg.
-3-
A B
O
zD
C
I
x
=15F
M
.
..
N0
....
N1
N2N3
N4
N5
N60.
O
A
1
)(st
).( 1smv
0 2
10
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:(P) r = 10 cm
J. M=-2,24.10-3N.m. (S) m = 250g , ,ABC *:AB % 50 .
BC* R =1 m);(0 OBOC. . :0=60g=10 m.s-2.
.I (S) A . .VB=1,5m.s-1,AB=50cm1. (S) AB. ...(S),.2 T (S) AB, .3. T (S) B.
.II (S) B ,(S) BC, 4,32 ..1 J .2. M (S) BC );( OMOC(S)VM.
1.2 (S)BM mgR0.2.2 .BC((S3.2
3
5BM VV .
13
.g=10N/KgAB=1m (P)
R2=2cmR1=20cm S1S2 M1=0,3kgM2=6kg . =cte S2 A B
S1 A/ .B/-1.1 P
S1 S2.2.1- V2 S2V1 S1.3.1- ABAB.-4.1 :1P S12P S21T (1) S12T (2) S2.2- S2 B S2 .
:( ) 15W P j
.
-1.2 X S2 .2.2- S2 BAD AD r D . S2 B D M2gBAXr.
1(12 )I- d=5,5cm h=41cm 150bar .=25
1- VM .( )2- .-3 ((P=1bar,=25C4- 20% Vm=24L/mol. :(SI)R=8,31M(O)=16g/molM(N)=14g/mol.
II-V1=40mL C1=5.10-2mol/L V2=10mL C2= 0,1mol/L.
-1 .2- .3- .
-4-
O
A
BM
C
(S)
(P) f
0
S1
S2
A
D
C
B
(P)
((1
((2 ()
=30
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m=40mg.1 V=200mL (S1) C1.1.1 .1.2 C1 (S1).1.3 .1.4 )(aqNa )(aqOH (S1)1.5 . 2. v=0,24L =20C .P=1bar
, (S2) C2.2.1 .2.2 .2.2 C2 (S2). .2.3 .2.4 (S2).2.5 .
3. ((S ((S1 (S2). )(aqNa )(aqCl .
3 , 1,33g, 80mg (A)80mg (B) .
.1 ..2 (A)(B).: 2
3CO, 3HCO.3. .((A)(B4. 20cL .
1.4. (A)(B) .2.4. ((A)(B .3.4. .
4(12 )I- .:=1,92kg.dm-3
-1 .2- V0=10,0mL V1=200mL .3- .
II-2,9g (C4H10) 1=20C P=1atm1-V1 .2- P=1atm .-3 2=30C.V2 .
5
-1 m II S1 V1=60mL C1.-1.1 . -2.1 m S1 :0,6mol/L.3.1- .-2 S1 S2 V2=40mL C2=0,1mol/L.
1.2- .-2.2 .3.2- 50 . . g/mol:O :16N :14Fe :56
-5- :
2013/2014
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