5
Réponses aux problèmes a numéraé impairs
À—’—19
10.5
6,80 >< 10“46 m2 kg
_,
,
'
10.7
1, = [, = 2,78 ><
m2 kg; [, = 4,42 >< 10—47m2'kg
.
.
10.9
1,84 rad s“2
-
-
_,
__
'
_'
,
.
.
10.11 325 s; 452 tours
.
…
.
f
…
_
,
._
10.13 (a) 0,436 rad s_2;
(b) 21,80 rac1; (c) 176,58 m2 kg s“1; (d) 192,49 J.
.
10.15 33,4 Nm; 6,31 >< 104J
'
,
10.17 68,6 m2 kg s—l, 5997 J; 12,72 Nm, 1199,4 W
5
-
%
_
;
_
10.19h=2,7R
_.
10.21 226,551 J
_
V
.
,
'
_
10.23 (51) 3g sin œ/2L;
(b) …;
(c) %Mg cos aparaèle 5111 rayonet —,—îMg-'cosa_
.
perpendiculaire au rayon
»
'
' —
_
.
_
.
10.25 (3) ax = —%L sin a; x (acc. ang.), ay .: %L cos a
(acc. ang_); .
_
_
_
‘
(b) acc. ang. = —15g cos a/L(4 + 6 cos2 œ).
'
—…
_
10.27 (a) mva;
(b) mv, avant; mv(1 + ML/Zma)/(l‘+ ML2/3ma2)—apïès; ?
Q.
’
(d) —(%mljz)MLz/(ML2 + 3ma2)
,_
:
»
-,
10.29 (a) 8,702 rad s_2;
(b) 4,351 ms.—2;
(c) 54,49N»
10.31
.
_
?
—
10.33 04 = [m — m’(r/R)]g/[%M + m +'m’(r/R)Z]R, q;,=,Ra, a’
,_
-
_
10.35 (a) 120,05 J;' (b) 35,32_Nsurle_brin gauche.et_32,37 N_surléabïin…erit
Ï
1037 7,84 rad s—'1
…
,
*
,:
1043 (a) 1,40 >< 10-2 >< (47z)2Nm;
(b) 7z/2
"
_
f -
;
'
CHAPITRE H
—
_
‘:'
'
‘
'
'
;
_
.
1'1_3 C/\/2—; \/2moc2; (\/2' _
__,
….
…
.
11.5
(a) Ina/0,916;

;Ïi
11.7
1,65 >< 10—17mkg
_
‘
.
'
11.9
c/1386; c/37,2
»
AE/moc2 = 0,153, 114108913807
‘
.
11110. 6,28 MeV
.
' .ÏÎ.
'
Ï
[ 1119 5,34 ><
m. k‘g s”497MeV/c2XlOMeV/c
_,
…
1121 1014 m s—2,.0,51z…x mm…—2
"
37 1123 < 10‘4n1rsf-2; Ï (b):
::}s [ 111127 *
}5ÏGGeV 178@GeV
.:51 1
.
'
55
.
…
1133 (a) &; 1! (E1 +m2‘32) (b)Q=0
123 (a)4m2@nsûOä/nHz05rad
_,