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Problem Set 24

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Math& 254
Problem Set 24
Triple Integrals in Cylindrical Coordinates
>f X
Objectives:
•
•
Set up and calculate iterated triple int egra ls in cylindrical coordinates.
Use triple integrals to calculate physical quantities such as mass, center of mass, and average
value.
Problem 01: Let E be the region enclosed by the paraboloid
5, and the xy-pla ne. Let f (x, y, z) = e 2 •
z = 1 + x 2 + y 2 , the cylinder x 2 + y 2
2..= 1+ri
a)
Set up an integral of f(x,y ,z) over E in cyli ndrical coordinates.
b)
Evaluate the integral.
J
i + (' l
\o.,,. :
ez
I"
d :z.
I.,
f'>
z
e
=
'---r----''
H r-
e
r-
r~G"
1.
• r.
_f\
0
M , d<ile :
') J?
j
l
f'.e
(+ e~)-(i)
- T"
·~
C
o~:
J
9--l1
o
',
(2, - ~
dr ·--
HO
Q..
:::-
- rd,..
-e
d-
}.
LC:- / 4- l" l
( 0e.,~'.-
r,J?
0~0
ck~ .1..., d"'
0 )
dr- :::
3--C"
-
(;
d& -
.e., - ~ - 'l
0 -
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