Gradient fields Find the gradient field F = ▿ϕ for the potential function ϕ. Sketch a few level curves of ϕ and a few vectors of F . 26. φ ( x , y ) = x 2 + y 2 , for x 2 + y 2 ≤ 9 , ( x , y ) ≠ ( 0 , 0 )
Gradient fields Find the gradient field F = ▿ϕ for the potential function ϕ. Sketch a few level curves of ϕ and a few vectors of F . 26. φ ( x , y ) = x 2 + y 2 , for x 2 + y 2 ≤ 9 , ( x , y ) ≠ ( 0 , 0 )
Solution Summary: The author explains how to find the gradient field F=nabla phi for the potential function
Gradient fieldsFind the gradient fieldF = ▿ϕ for the potential function ϕ. Sketch a few level curves of ϕ and a few vectors ofF.
26.
φ
(
x
,
y
)
=
x
2
+
y
2
,
for
x
2
+
y
2
≤
9
,
(
x
,
y
)
≠
(
0
,
0
)
Quantities that have magnitude and direction but not position. Some examples of vectors are velocity, displacement, acceleration, and force. They are sometimes called Euclidean or spatial vectors.
onsider the following equation.
u = (v3i - )
f(x, y) = sin(3x + 4y), P(-12, 9),
(a) Find the gradient of f.
Vflx v)
- 40 Let u(t) = 8t i+ (-9)j-8k and v(t)= e'i+9ej- e "k. Compute the derivative of the following function.
u(t) - v(t)
z5 (1
Select the correct choice below and fill in the answer box(es) to complete your choice.
z6(
O A. The derivative is the scalar function
actice
Di+k.
O B. The derivative is the vector-valued function
i+
st 2 (
uiz 7 (1
uiz 8 (1
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uiz 9 (1
Practice Test3
3. Let f(x, y) = sin x + sin y. (NOTE: You may use software for any part
of this problem.)
(a) Plot a contour map of f.
(b) Find the gradient Vf.
(c) Plot the gradient vector field Vf.
(d) Explain how the contour map and the gradient vector field are
related.
(e) Plot the flow lines of Vf.
(f) Explain how the flow lines and the vector field are related.
(g) Explain how the flow lines of Vf and the contour map are related.
Precalculus: Mathematics for Calculus - 6th Edition
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