Patrick F. answered • 10/05/15

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To find the acceleration when the velocity = 0, you need to know when (at what time) that occurs. Since v = ds/dt, we have

v = 3t

^{2}- 3v(t

_{0}) = 0 = 3t_{0}^{2}- 3Call this value t

_{0}= 1. Then go back to the expression for acceleration and plug it in:a = d

^{2}s/dt^{2}= 6ta(t

_{0}) = 6(1) = 6.