Solving Stokes Problem with Circle and Vector Field - Help with Homework

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SUMMARY

The discussion centers on solving the Stokes Problem involving a vector field F⃗ = 5yi⃗ - 5xj⃗ + 4(y-x)k⃗ and a circular path C of radius 2 in the plane defined by x+y+z=3. The user calculated the curl of F as <4,4,-10> and the surface normal dS as <1,1,1>, leading to an integral result of -8π for the area of the circle. However, this answer was marked incorrect by the online homework system, prompting requests for clarification and assistance.

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  • Understanding of Stokes' Theorem
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  • Ability to compute dot products in vector fields
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Homework Statement



Find ∫CF⃗ ⋅dr⃗ where C is a circle of radius 2 in the plane x+y+z=3, centered at (2,4,−3) and oriented clockwise when viewed from the origin, if F⃗ =5yi⃗ −5xj⃗ +4(y−x)k⃗

Homework Equations



Stokes theorem.

∫curl F ⋅dS

The Attempt at a Solution


For the curl I get <4,4,-10>
For dS I get <1,1,1> from z = 3-x-y
Dotted together its -2
so

-2∫∫dA
Area of circle is 4∏

-8∏ is my answer but online homework system says it's not… Please help!
 
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amk1995 said:

Homework Statement



Find ∫CF⃗ ⋅dr⃗ where C is a circle of radius 2 in the plane x+y+z=3, centered at (2,4,−3) and oriented clockwise when viewed from the origin, if F⃗ =5yi⃗ −5xj⃗ +4(y−x)k⃗

Homework Equations



Stokes theorem.

∫curl F ⋅dS

The Attempt at a Solution


For the curl I get <4,4,-10>
For dS I get <1,1,1> from z = 3-x-y
Dotted together its -2
so

-2∫∫dA
Area of circle is 4∏

-8∏ is my answer but online homework system says it's not… Please help!

I get the same as you did.
 

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