Answer:
conservation of momentum principle
Step-by-step explanation:
The force due to change in momentum is larger when a car is involved in a serious collision because of the conservation of momentum principle.
According to this principle, the total momentum of a closed system remains constant, provided that no external forces act on the system. In the case of a car involved in a collision, the car and anything it collides with form a closed system.
When the car collides with another object, such as another car or a stationary object, the momentum of the car changes rapidly, resulting in a large force being exerted on the car and its occupants. This force is proportional to the change in momentum and the time over which the change occurs, as described by Newton's second law of motion.
In a serious collision, the change in momentum is typically very large, as the car comes to a sudden stop or changes direction rapidly. Therefore, the force exerted on the car and its occupants is also very large, which can result in serious injuries or even death.
To reduce the force due to change in momentum in a collision, it is important to design cars with safety features such as airbags, seat belts, and crumple zones that can absorb and distribute the force of a collision more evenly.