Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
Related questions
Question
In the equations of the image below, what does the ds stand for?

Transcribed Image Text:Tangential and Normal Components of
Acceleration
When an object is accelerated by gravity, brakes, or rocket motors, we often need to know how
much of the acceleration acts in the direction of motion, which is the direction of the tangent
vector T. We can calculate this using the Chain Rule to rewrite v as
a
=
=
=
-T+
V=
Then we differentiate both ends of this string of equalities to get
d²s
dt²
dr
dt
d.s
dt ds dt
-T+K
=
2
ds
(1) ²N.
dt
dr ds
ds dt
ds dT
dv d ds d²s
= = -T+
dt²
- (¹) - ¹ + de de
(Td²)
=
dt dt
dt
dt dt
d² s
dT ds
ds
d² s
= T+
dt²
dt²
=
T
ds
dt
dt
ds
(KN d₂)
dt
dT
ds
= KN
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