Resolução do capítulo 1 brunetti[1]
- 19. 1.10 – Resolução
R2
R3-R2
n
µF
*
Fµ
R2-R1
cm,m,h
,,,
,
h
,h,
,
,
RFMctenComo
FFque
afirmarse-podeRRRRComo
hR
RR
Rn
F
hR
RR
Rn
F
m
*
*
52310523
30302301002800102
10106010
30302
101060
301002
80010210
2
2
2
2
2
2
4
2
2
4
2
1223
2
12
2
2
23
2
=×≅∴
××π×××π×××
×××
=
×××π×
××
××π
×××=
××=⇒=
=
−=−
π×
−
×π
×ρ×ν=
π×
−
×π
×ρ×ν=
−
−
−
−
−
µ
µµ
µ
µ
- 24. 1.12 – Resolução (cont.)
Nm,,,M
MMMaigualseráquemotorseja,ourotação,dadireçãona
Mmomentoumexistirdevequeconcluirse-podeMMComo
Nm,
,
,
)
,
(
D
FM
Nm,
,d
TM
2
i
104252
52
2
502
50
10
2
50250
10
10
2
42
2
10
48
2
1
12
2
3
2
1
=−=
−=
>
=×
π
××π×
×
−
×=×=
=×=×=
−
−
µ
s
m
v
v *
*
10
255
2
=∴=
µF
2
iD
T
2
d
2
d
T ×
n
*
v
2
iD
F ×µ
- 28. 1.14 – Resolução
001040005010500
1002510400
1
2550050500050
2005010400
1
50
5050050
1
50
1
2502010
2010200
1010521
2
2
2
2
2
2
2
=××=τ∴=+×−=⇒=
=××=τ∴=+×−=⇒=
=××=τ∴=⇒=
+−=+=⇒=∴
−=∴××−×=
−=∴+××=∴=⇒=
=∴=⇒=
×+×=∴=⇒=
++=
−
−
−
,
dy
dv
0,1mypara
cm
dina
s
,
dy
dv
m,ypara
cm
dina
sdy
dv
0ypara
y
dy
dv
ey-250yv
s
b
ms
aa,,0,1a2,5:(1)em(2)De
(2)a,bb,a
dy
dv
0,1mypara3)
0c0v0ypara2)
(1),b,a,
s
m
2,5v0,1mypara)
cbyayv
2
2