15. (a) If the position of a particle is given by x = 25t - 6.0t³,
where x is in meters and t is in seconds, when, if ever, is
the particle's velocity v zero? (b) When is its acceleration
a zero? For what time range (positive or negative) is a (c)
negative and (d) positive?
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Answer:
a. time at which velocity is zero is 5/3 root 2 b. t = 0 c.
Explanation:
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