When a car comes to a sudden stop, the passengers in the car move forward due to inertia. Inertia is the tendency of an object to resist any change in its motion. When the car is moving forward, the passengers are also moving forward at the same speed. When the car suddenly stops, the passengers continue to move forward due to inertia. This can cause the passengers to hit the windshield or other objects in the car.
To prevent passengers from being injured in a sudden stop, cars are equipped with seat belts. Seat belts restrain the passengers and prevent them from moving forward when the car stops. This can help to prevent passengers from being injured in an accident.
