2. Let F = (-y/2, x/2), and let C be the curve shown below. What is F ds? Explain %3D why. y 1 1 2 3

Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
Publisher:Ron Larson
Chapter6: Topics In Analytic Geometry
Section6.2: Introduction To Conics: parabolas
Problem 4ECP: Find an equation of the tangent line to the parabola y=3x2 at the point 1,3.
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2. Let F = (-y/2, x/2), and let C be the curve shown below. What is F.ds? Explain
%3D
why.
y
2
C
3
Transcribed Image Text:2. Let F = (-y/2, x/2), and let C be the curve shown below. What is F.ds? Explain %3D why. y 2 C 3
Expert Solution
Solution:

The vector field is F=-y2, x2

C1:0, 02, 0rt=2t, 0, r't=2, 0

F=0, t

Hence, the integral becomes C1F·dr=010, t·2, 0dt=0 

C2:2, 02, 1rt=2, t, r't=0, 1

F=-t2, 1

Hence, the integral becomes C2F·dr=01-t2, 1·0, 1dt=1

 

It follows

C3:2, 13, 1rt=2+t, 1, r't=1, 0

F=-12, 2+t2

Hence, the integral becomes C3F·dr=01-12, 2+t2·1, 0dt=-12

C4:3, 13, 2rt=3, 1+t, r't=0, 1

F=-1+t2, 32

Hence, the integral becomes C4F·dr=01-1+t2, 32·0, 1dt=32

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