- #1
IniquiTrance
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When I take the line integral around a square shape path "C" as follows:
From A to B to C to D to A
C1 = A(0, 0) to B (4, 0)
t i
0 <= t <= 4
C2 = B (4, 0) to C (4, 7)
4 i + (t - 4) j
4 <= t <= 11
C3 = C (4, 7) to D (0, 7)
(15 - t) i + 7 j
11 <= t <= 15
C4 = D (0, 7) to A (0, 0)
(22 - t) j
15 <= t <= 22
Why is that when I take the line integral around this path using [tex]\int_{C }||r'(t)|| dt[/tex] and the above parameterization, I end up with 0, when I should be getting the arc length of the path, which is the perimeter of the square?
Thanks!
From A to B to C to D to A
C1 = A(0, 0) to B (4, 0)
t i
0 <= t <= 4
C2 = B (4, 0) to C (4, 7)
4 i + (t - 4) j
4 <= t <= 11
C3 = C (4, 7) to D (0, 7)
(15 - t) i + 7 j
11 <= t <= 15
C4 = D (0, 7) to A (0, 0)
(22 - t) j
15 <= t <= 22
Why is that when I take the line integral around this path using [tex]\int_{C }||r'(t)|| dt[/tex] and the above parameterization, I end up with 0, when I should be getting the arc length of the path, which is the perimeter of the square?
Thanks!