Evaluate ∫ C F ⋅ d r by inspection for the force field F ( x , y ) = i + j and the curve C shown in the figure. Explain your reasoning. [ Note : For clarity, the vectors in the force fields are shown at less than true scale.]
Evaluate ∫ C F ⋅ d r by inspection for the force field F ( x , y ) = i + j and the curve C shown in the figure. Explain your reasoning. [ Note : For clarity, the vectors in the force fields are shown at less than true scale.]
Evaluate
∫
C
F
⋅
d
r
by inspection for the force field
F
(
x
,
y
)
=
i
+
j
and the curve C shown in the figure. Explain your reasoning. [ Note: For clarity, the vectors in the force fields are shown at less than true scale.]
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.
You are on a rollercoaster, and the path of your body is modeled by a vector function r(t),
where t is in seconds, the units of distance are in feet, and t = 0 represents the start of the
ride. Assume the axes represent the standard cardinal directions and elevation (x is E/W, y
is N/S, z is height). Explain what the following would represent physically, being as specific
as possible. These are all common roller coaster shapes/behaviors and can be explained in
specific language with regard to units:
a. r(0)=r(120)
b. For 0 ≤ t ≤ 30, N(t) = 0
c. r'(30) = 120
d. For 60 ≤ t ≤ 64, k(t) =
40
and z is constant.
e.
For 100 ≤ t ≤ 102, your B begins by pointing toward positive z, and does one full
rotation in the normal (NB) plane while your T remains constant.
Chapter 15 Solutions
Calculus Early Transcendentals, Binder Ready Version
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