Verify Stokes' theorem for the helicoid Yr. Ø) = rsin 0, oriented upwards, where 0
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
![(rcos 0,
‚r sin 0, 4)
oriented upwards, where 0 <r <1 ,0<0<5
, and F is the vector field F = (4z, 5x2, 8y)
Verify Stokes' theorem for the helicoid Y(r, 0) =
First, compute the surface integral:
(curl F) · n dS
dr de
Compare that computation with the line integral on the boundary of Y. From the picture, notice that boundary consists of 4 curves. Parametrize each curve by restricting the domain of Y to an
appropriate subset.
Ci Straight line with 0 = 0
01 =
F. dr
dr
C2 Straight line with 0 = 4
02 =
F. dr =
dr
C3 Straight line with r = 0
03 =
F. dr =
de](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa40747ab-a715-4b8f-ac3d-96cea976aaee%2F7ac5048b-fdaa-45ef-85e0-bfda3b4090ce%2F7lo2f1q_processed.png&w=3840&q=75)
Transcribed Image Text:(rcos 0,
‚r sin 0, 4)
oriented upwards, where 0 <r <1 ,0<0<5
, and F is the vector field F = (4z, 5x2, 8y)
Verify Stokes' theorem for the helicoid Y(r, 0) =
First, compute the surface integral:
(curl F) · n dS
dr de
Compare that computation with the line integral on the boundary of Y. From the picture, notice that boundary consists of 4 curves. Parametrize each curve by restricting the domain of Y to an
appropriate subset.
Ci Straight line with 0 = 0
01 =
F. dr
dr
C2 Straight line with 0 = 4
02 =
F. dr =
dr
C3 Straight line with r = 0
03 =
F. dr =
de
![C4 Arc with r = 1
F. dr =
do
%3D
Check that the sum of these integrals agrees with your answer from Stokes' theorem.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa40747ab-a715-4b8f-ac3d-96cea976aaee%2F7ac5048b-fdaa-45ef-85e0-bfda3b4090ce%2F1endu8f_processed.png&w=3840&q=75)
Transcribed Image Text:C4 Arc with r = 1
F. dr =
do
%3D
Check that the sum of these integrals agrees with your answer from Stokes' theorem.
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