Final answer:
Modern vehicles are designed to protect passengers by increasing the time of impact in a crash, which decreases the force acting on the passengers and reduces the risk of injury.
Step-by-step explanation:
Cars these days have parts that can crumple or collapse in the event of an accident. This design feature helps protect the passengers by increasing the time of impact. When the car crumples, it extends the duration of the collision, which decreases the force acting on the passengers. The longer collision time means that the force on the passengers will be less, reducing the risk of injury.