An endurance training runner begins at point A and races to point B, then switches and races again to point A, then switches and races again to point B. The position for the athlete at time (t) is given by: s(t)=t^3-6t^2+9t-2 a) On which intervals is the velocity positive? In which direction is the runner running during these intervals? b) On which intervals is the velocity negative? In which direction is the runner running during these time intervals? c) At which point is velocity zero? What is the runner’s movement at these points?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 94E
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An endurance training runner begins at point A and races to point B, then switches and races again to point A, then switches and races again to point B. The position for the athlete at time (t) is given by: s(t)=t^3-6t^2+9t-2 a) On which intervals is the velocity positive? In which direction is the runner running during these intervals? b) On which intervals is the velocity negative? In which direction is the runner running during these time intervals? c) At which point is velocity zero? What is the runner’s movement at these points?
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