A person who is properly restrained by an over-the-shoulder seat belt has a good chance of surviving a car collision if the deceleration does not exceed 30 "gg's" (1.0g=9.8m/s2)(1.0g=9.8m/s2). Assuming uniform deceleration at 30 gg's, calculate the distance over which the front end of the car must be designed to collapse if a crash brings the car to rest from 90 km/hkm/h

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