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A 2500-kg car traveling at 6.0 m/s runs into a wall. The complete wall is not...

A 2500-kg car traveling at 6.0 m/s runs into a wall. The complete 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, the center of mass travels forward 0.4 meters. A) What is the magnitude of the average force exerted on the car? B) What is the time of the crumple?

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