prépa devoirs n°1.pdf

7/29/2019 Prpa Devoirs n1.pdf

1/5

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


2/5

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


3/5

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


4/5

12

:(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


5/5

2

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

prépa devoirs n°1.pdf

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