A forward for the Vancouver Canucks was skating with a velocity of 16 km/hr in the positive horizontal direction when he was hit by an opposing defenseman at centre ice. After only 0.2 seconds, the Canuck had come to a complete stop. What acceleration did the Canuck experience (in m/s2) as a result of the hit? Hint: remember that acceleration can be positive or negative. Express your answer to 1 decimal place (do not put units in your answer)