1. The coordinate of a point undergoing rectilinear motion is given by x(t) = t³ – 4t, -2

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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1. The coordinate of a point undergoing rectilinear motion is given by
x(t) = t³ – 4t,
-2 <t< 3.
Find:
(a) The times at which the instantaneous velocity is zero.
(b) The set {t E [-3, 3] : x(t) is speeding up}.
(c) The set {t e [-3, 3] : x(t) is moving in the negative direction.}.
(d) The absolute maximum of the set {x(t) : t e [-3, 3]} and the time(s) at which
this maximum is achieved.
(e) The time(s) guaranteed by the mean value theorem at which the instantaneous
velocity is equal to the average speed over the interval [-3, 3].
Draw the graph of x(t).
1
Transcribed Image Text:1. The coordinate of a point undergoing rectilinear motion is given by x(t) = t³ – 4t, -2 <t< 3. Find: (a) The times at which the instantaneous velocity is zero. (b) The set {t E [-3, 3] : x(t) is speeding up}. (c) The set {t e [-3, 3] : x(t) is moving in the negative direction.}. (d) The absolute maximum of the set {x(t) : t e [-3, 3]} and the time(s) at which this maximum is achieved. (e) The time(s) guaranteed by the mean value theorem at which the instantaneous velocity is equal to the average speed over the interval [-3, 3]. Draw the graph of x(t). 1
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