4. How do safety belts of cars help in preventing accidents?

Safety belts, also known as seat belts, play a crucial role in preventing injuries and fatalities in car accidents in several ways:

1. Restraint during impact: In the event of a collision, safety belts restrain occupants and prevent them from being thrown forward or ejected from the vehicle. This reduces the likelihood of severe injuries or fatalities by keeping occupants inside the car, where they are better protected.

2. Distribution of force: Safety belts distribute the force of impact across the stronger parts of the body, such as the chest, hips, and shoulders. This helps to reduce the concentration of force on any single area, thereby minimizing the risk of serious injuries to vital organs.

3. Slowing down occupants: Safety belts help to slow down occupants' bodies gradually during a crash, extending the time over which the force of the impact is experienced. This reduces the peak force exerted on the body, which in turn decreases the likelihood of injury.

4. Preventing secondary collisions: In the event of a crash, safety belts can prevent occupants from colliding with other objects inside the vehicle, such as the steering wheel, dashboard, or windows. This reduces the risk of additional injuries that can occur due to secondary collisions within the vehicle.

5. Protecting against airbag injuries: While airbags provide additional protection in a crash, they can also cause injuries if occupants are not properly restrained. Safety belts help to position occupants correctly in relation to the airbags, ensuring that they deploy effectively and minimizing the risk of injuries caused by airbag deployment.

Overall, safety belts are a fundamental component of vehicle safety systems, and their proper use significantly reduces the risk of injury and death in car accidents.