Unbelted vehicle occupants reach 0 mph by striking the windshield steering column and dashboard?

Unbelted vehicle occupants experience a sudden deceleration during a crash, leading to a rapid shift from high speed to 0 mph upon impact with the vehicle's interior structures, such as the windshield, steering column, and dashboard. This abrupt stop can result in severe injuries or fatalities, as the human body continues to move forward at the pre-collision speed until it contacts these hard surfaces. Seatbelts are crucial in restraining occupants, reducing the risk of such traumatic impacts.