CONCEPT CHECK Line integral What is the physical significance of each line integral? a) ∫ C 1 d s b) ∫ C f ( x , y , z ) d s , where f ( x , y , z ) is the density of a string of finite length.
CONCEPT CHECK Line integral What is the physical significance of each line integral? a) ∫ C 1 d s b) ∫ C f ( x , y , z ) d s , where f ( x , y , z ) is the density of a string of finite length.
Solution Summary: The author explains how to calculate the physical significance of the line integral displaystyle
Line integral What is the physical significance of each line integral?
a)
∫
C
1
d
s
b)
∫
C
f
(
x
,
y
,
z
)
d
s
, where
f
(
x
,
y
,
z
)
is the density of a string of finite length.
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.
1. A bicyclist is riding their bike along the Chicago Lakefront Trail. The velocity (in
feet per second) of the bicyclist is recorded below. Use (a) Simpson's Rule, and (b)
the Trapezoidal Rule to estimate the total distance the bicyclist traveled during the
8-second period.
t
0 2
4 6 8
V
10 15
12 10 16
2. Find the midpoint rule approximation for
(a) n = 4
+5
x²dx using n subintervals.
1° 2
(b) n = 8
36
32
28
36
32
28
24
24
20
20
16
16
12
8-
4
1
2
3
4
5
6
12
8
4
1
2
3
4
5
6
=
5 37
A 4 8 0.5
06
9
Consider the following system of equations, Ax=b :
x+2y+3z - w = 2
2x4z2w = 3
-x+6y+17z7w = 0
-9x-2y+13z7w = -14
a. Find the solution to the system. Write it as a parametric equation. You can use a
computer to do the row reduction.
b. What is a geometric description of the solution? Explain how you know.
c. Write the solution in vector form?
d. What is the solution to the homogeneous system, Ax=0?
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