use IFft I t.EE IEI EsEi.mtaiyiart...Remark foreg37 If we use ds IFft I dt then t.EE i IEI...
Transcript of use IFft I t.EE IEI EsEi.mtaiyiart...Remark foreg37 If we use ds IFft I dt then t.EE i IEI...
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Remark foreg37
If we use ds IF ft I d t then
t.EE i IEI EsEi.mtaiyiart
where arc length s is definited Cup a additiveconstant
by tS Ct f trEt Idt
toA parametrization of a curve C by our lengths iscalled arclengthparametrization
Fcs are lengthparametrization then
I 1 1
DefI A vectorfield is defined to becarteddutiable if the component functions
eg3I FCxy xItgF is co but
Fahy j5Ig isnotcontinuous in R2
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Line integral of vectorfield
DefI let C be a curve with orientation givenby a parametrization Fct with JETS f 8 ft
Define the lute integral of a vector field F along
e a wqe.is
where F Iffffy is the unit tangent vectafieldalong C
nNote If F a b IR Cn or3 then
F Fds fabELFCts ftp.ffttflrttsldtw
E Fds
fabECFftp.tftsdt
Hence we also write µ E Tds F df
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eg3I Fix y zit xyj y IC Tct ti tf tf I of te l
xctsityitsitzctiEJThenJdEoFdsJcE.dF
Jlffit 2 t j that it I tfEk dt
f Cart t3 t At
LineIntegraloffMitNjalongeC F Cts gets it hit j can beexpressed as
F Tds Foodf
Sc E adit dt
Sb44gifts NextDdta
Similarly fr E ME NIKI along C
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Fct getsit hits It fits I 5
IF Fds SabEngEts t Natt t Lf'teDdt
Note Usually people write DX 9ft dedy hEtsdatde fats de
The line integral can be denoted by
ICE Fds L Mdx Ndy t Ld z
Setuilarly fa R situation
One can also think of F CX y z is the position
veotaffiddJanddr_cax.dy.dZTlthenScfaFds
fd yN.h DXdy DD
dMdx t Ndy th de
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39 Evaluate I fcydxttdytzxdzwhl.nlc Fct cost eat suit j th Often
Cast suit t
Soth X cost y suit 2 t
DF f suit cat a dt
I suit C suit tasttacatJdt
SoHfsinett taste zost at
IT
physics
is F ForcefieldC oriented cave
then IW SdEo
is wakdone in moving an object along d
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E velocity vector field of fluidoriented curve
Then
I Flow L E TdsElon 7
If C is a closed cave the floe is alsocalled the circulation c
DefI A curve is said to be
is simple if it does not intersect with itself
exopt possibly at end points
dosed starting point endpoint
also called a loop
Ii's swipleclosed cave if it is both simple and
closely
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note8 9
t