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s = t³ + 24t + 6
Turunan dari s adalah v
ds/dt = v = 3t² + 24
Saat v = 36 m/s ⇒ 3t² + 24 = 36
3t² - 12 = 0
t² - 4 = 0
(t - 2)(t + 2) = 0
t = 2 dan t = - 2, ambil t > 0 maka t = 2
Turunan dari v adalah
a = dv/dt = 6t
Jadi saat t = 2 ⇒ percepatan a = 6(2) = 12 m/s²
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