Motion Along a Line In Exercises 81-84, the function s ( t ) describes the motion of a particle along a line. (a) Find the velocity function of the particle at any time t ≥ 0 . (b) Identify the time interval (s) on which the particle is moving in a positive direction. (c) Identify the time interval(s) on which the particle is moving in a negative direction, (d) Identify the time(s) at which the particle changes direction. s ( t ) = t 3 − 20 t 2 + 128 t − 280
Motion Along a Line In Exercises 81-84, the function s ( t ) describes the motion of a particle along a line. (a) Find the velocity function of the particle at any time t ≥ 0 . (b) Identify the time interval (s) on which the particle is moving in a positive direction. (c) Identify the time interval(s) on which the particle is moving in a negative direction, (d) Identify the time(s) at which the particle changes direction. s ( t ) = t 3 − 20 t 2 + 128 t − 280
Solution Summary: The author explains that the speed function can be computed by differentiating the function for distance with respect to time.
Motion Along a Line In Exercises 81-84, the function
s
(
t
)
describes the motion of a particle along a line. (a) Find the velocity function of the particle at any time
t
≥
0
. (b) Identify the time interval (s) on which the particle is moving in a positive direction. (c) Identify the time interval(s) on which the particle is moving in a negative direction, (d) Identify the time(s) at which the particle changes direction.
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