The severity of a body’s injuries depends on several factors in a car accident. Some factors include the speed at which both drivers were traveling, whether drivers or passengers were using seatbelts, and the type of car accident. Your body travels at the same speed as the vehicle, which means your body will decelerate from the speed at which the vehicle was traveling. In this type of car accident, your seatbelt will lessen the severity of the injury, even if you are injured in the crash.