Final answer:
The worst possible type of crash is typically a head-on collision, as it involves direct impact between two vehicles at high speeds, resulting in significant damage and severe injuries.
Step-by-step explanation:
Out of the given options, head-on collision is generally considered the worst type of crash. This is because a head-on collision involves two vehicles colliding directly with each other at high speeds, resulting in a high amount of force and impact. The force experienced in a head-on collision can cause significant damage to the vehicles and severe injuries to the occupants.
For example, if a car traveling at 60 km/hr collides head-on with another car also traveling at 60 km/hr, the total impact force would be equivalent to a car hitting a stationary wall at 120 km/hr. In contrast, rear-end collisions, side-impact collisions, and rollover collisions may also cause damage and injuries, but they are generally considered less severe than head-on collisions.