Final answer:
The 'Second Collision' in a motor vehicle crash is the impact between occupants and the interior of the vehicle after the initial collision. It highlights the importance of safety features in reducing injuries from this second impact.
Step-by-step explanation:
The “Second Collision” in a motor vehicle crash refers to the impact that occurs between the occupants and the interior of the vehicle after the initial collision between the vehicle and another object, such as another vehicle or a wall. When a vehicle crashes, the car itself may come to an abrupt stop, but the occupants continue moving at the vehicle's pre-collision speed until they hit something inside the car, like the steering wheel, dashboard, or seatbelt. This can cause significant injuries, which is why safety features like airbags and seatbelts are critical, as they help to absorb some of the force and minimize the impacts of these secondary collisions.