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6. Cubic Velocity Relationship 10 pts possible The velocity of a particle moving along the T axis is given by Vx = at - bts for t >0, where a = 27 m/s', b = 2.3 m/s, and t is in S. What is the acceleration of the particle when it achieves its maximum displacement in the positive a direction? Answer in units of m/s2. Answer in units of m/s^2