What is the purpose of a seatbelt?

The purpose of a seatbelt is primarily to secure passengers in place during a crash. When a vehicle experiences sudden deceleration, such as in a collision, the forces involved can cause unrestrained passengers to be thrown around the cabin or even ejected from the vehicle. A seatbelt is designed to keep the passenger securely in their seat, reducing the risk of injury by minimizing movement and helping to distribute the forces of a crash across stronger parts of the body, such as the chest and pelvis. This safety feature is crucial for protecting individuals in the event of an accident, highlighting the importance of seatbelt use for every occupant of a vehicle.

While comfort and assistance in maintaining speed may seem relevant, they are not the primary functions of a seatbelt. A seatbelt does not prevent a car from rolling or assist in controlling the vehicle's speed; its main focus is on safety during a crash scenario.