What happens to the people in a car that makes a sudden stop?

When a car makes a sudden stop, the occupants inside experience inertia, which causes them to continue moving forward at the same speed the car was traveling. This can lead to a risk of injury if they are not wearing seatbelts, as they may collide with the seat in front of them, the dashboard, or other passengers. Seatbelts help restrain the occupants, reducing the likelihood of injury by keeping them securely in place during the sudden deceleration. If unrestrained, the force of the stop can result in serious injuries or even fatalities.