1) A 1000-kg car is brought to a stop by a barrier over a time of 0.2 seconds during a crash, and the impulse delivered to the car is 8000 N·s. Calculate the average force exerted by the barrier on the car. 2) A baseball with a mass of 0.145 kg is struck by a bat and remains in contact with the bat for 0.002 seconds. If the impulse delivered to the baseball is 2.5 N·s, calculate the average force exerted by the bat on the baseball. 3) A soccer ball is kicked and remains in contact with the player's foot for 0.04 seconds. If the impulse delivered to the ball is 40 N·s, calculate the average force exerted by the foot on the soccer ball.

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