Math Problem Statement
Let C be the positively oriented circle centred at the origine with radius 2. Compute the circulation of the vector F = -yi + xj around a circle C using Green's theorem.
Solution
To compute the circulation of the vector field around the circle using Green's Theorem, we need to evaluate the line integral .
Green's Theorem states:
where . In our case, and .
First, compute the partial derivatives:
So, we have:
Now, we need to integrate this over the region , which is the disk of radius 2 centered at the origin. The area element in polar coordinates is .
The integral becomes:
The area of the disk with radius 2 is:
Therefore,
So, the circulation of the vector field around the circle is:
Would you like more details on any part of this solution or have any other questions?
Here are 5 questions you might want to ask:
- How is Green's Theorem applied in more complex vector fields?
- Can Green's Theorem be used to compute area?
- What are the conditions for using Green's Theorem?
- How can the circulation be interpreted physically?
- Can you explain the divergence theorem in relation to Green's Theorem?
Tip: When working with Green's Theorem, always check the orientation of the curve and ensure that the region is simply connected and the vector field components have continuous partial derivatives.
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Math Problem Analysis
Mathematical Concepts
Vector fields
Green's Theorem
Line integrals
Partial derivatives
Polar coordinates
Formulas
Green's Theorem: \( \oint_C \mathbf{F} \cdot d\mathbf{r} = \iint_D ( \frac{\partial Q}{\partial x} - \frac{\partial P}{\partial y} ) dA \)
Theorems
Green's Theorem
Suitable Grade Level
Advanced undergraduate level
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