Answer:
They extend the distance over which the impact force slows down the car's motion
Explanations:
The essence of the crumpling zone in newer cars is to convert part of the Kinetic energy of the car into a controlled deformation.
This will reduce the motion of the car at impact so that it takes a considerably longer time to stop, extend the distance over which the impact force slows down the car's motion, and reduce the shock on the passengers. This is essentially because the impact force will be reduced