The equation of motion of a particle is s = t3 − 27t, where s is in meters and t is in seconds. (Assume t ≥ 0.) (a) Find the velocity and acceleration as functions of t. v(t) = a(t) = (b) Find the acceleration after 4 s. m/s2 (c) Find the acceleration when the velocity is 0. m/s2
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