The equation of motion of a particle is s = t - 3t + t2 - t, where's is in meters and t is in seconds. (Assume t 2 0.) (a) Find the velocity, v(t), and acceleration, a(t), as functions of t. V(t) = a(t) = (b) Find the acceleration (in m/s2) after 1.4 s. a(1.4) = m / s 2 (c) Graph the position, velocity, and acceleration functions on the same screen. y 2 S a a V 0.5 1.0 1.5 2.0 X 2.5 3.0 0.5 1.0 1.5 2.0 2.5 X 3.0 -2 -2 -4 -4 0 6