Suppose a child drives a bumper car head on into the side rail, which exerts a force of 2000 N on the car for 0.600 s. (Assume the initial velocity is in the positive direction.)   (a) What impulse (in kg · m/s) is imparted by this force? (Indicate the direction with the sign of your answer.)    (b) Find the final velocity (in m/s) of the bumper car if its initial velocity was 2.90 m/s and the car plus driver have a mass of 200 kg. You may neglect friction between the car and floor. (Indicate the direction with the sign of your answer.)

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