Answer
(a) 0 cm/s
(b) t = 0, t = 2, and t = 4.2
(c) maximum: t = 1; minimum: t = 3
(d) −7 cm/s
Work Step by Step
(a) the average velocity over the interval 0 ≤ t ≤ 3
--0 cm/s
(b) the values of t at which the instantaneous velocity is zero
--t = 0, t = 2, and t = 4.2
(c) the values of t at which the instantaneous velocity is either a maximum or a minimum
--maximum: t = 1; minimum: t = 3
(d) the instantaneous velocity when t = 3 s
--−7 cm/s
