A 1500-kg  car traveling at 6.0 m/s  runs into the side of an underpass. The concrete wall is not affected, but the car crumples such that in the time interval from the instant of impact to the instant at which the car comes to rest, its center of mass travels forward 0.40 m Part A What is the magnitude of the average force exerted on the car?         Express your answer with the appropriate units.   Part B

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