How does inertia affect a person who is not wearing a seatbelt during a collision?

Inertia is defined as the tendency to remain unchanged unless an unequal outside force is acting on it. In physics, it is the property of matter to continue at rest or in motion unless that state is acted or changed by an external force. When the car moves, the person sitting on it has the same velocity with that car. During a collision, there will be an abrupt change in the car’s velocity. The person without a seatbelt will be thrown away from his seat with the same velocity as the car towards the direction at which the car is heading. In this case, that person will be thrown away at the front of the car. This will be a dangerous scenario as he might sustain a fatal injury after the impact.