Modern cars are designed to have crumpled zones (crumple means out of shape or irregular bends). The advantage of these zones is that it decreases the chance of serious injuries to the occupants of the vehicle. In case the car is solid rigid, all the energy from the impact of the car gets transferred to the passengers in the car. When the car is crumpled, it absorbs some of the energy in the crumples and, consequently, less amount of energy reaches the passengers.
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