The position of a body moving on a coordinate line is given by s = t2 – 4t – 3 for 0

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter11: Topics From Analytic Geometry
Section: Chapter Questions
Problem 18T
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Only answer part (d
The position of a body moving on a coordinate line is given by s = t² – 4t – 3 for 0 <t< 4, with s in meters and t in
seconds.
(a) Find the body's displacement and average velocity for the given time interval.
Displacement = 0
Average velocity = 0
m/s
(b) Find the body's velocity at the endpoints of the interval.
Velocity at t = 0 is -4
m/s
Velocity at t = 4 is 4
m/s
(c) Find the body's acceleration at the endpoints of the interval.
Acceleration at t = 0 is 2
m/s?
Acceleration at t = 4 is 2
m/s?
(d) When, ifever, during the interval does the body change direction? If there is more than one answer, enter a comm:
separated list. If the body never changes direction during the interval, enter NONE.
t =
I
Transcribed Image Text:The position of a body moving on a coordinate line is given by s = t² – 4t – 3 for 0 <t< 4, with s in meters and t in seconds. (a) Find the body's displacement and average velocity for the given time interval. Displacement = 0 Average velocity = 0 m/s (b) Find the body's velocity at the endpoints of the interval. Velocity at t = 0 is -4 m/s Velocity at t = 4 is 4 m/s (c) Find the body's acceleration at the endpoints of the interval. Acceleration at t = 0 is 2 m/s? Acceleration at t = 4 is 2 m/s? (d) When, ifever, during the interval does the body change direction? If there is more than one answer, enter a comm: separated list. If the body never changes direction during the interval, enter NONE. t = I
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