Acar impacting another car head-on will have the force of impact.

Newtons third law says that every action has an equal and opposite reaction, which means that when two cars collide frontally, first car acts on the second car with the same magnitude of the force but with an opposite direction than the second car acts on the first car. So the correct answer is: A car impacting another car head-on will have EQUAL MAGNITUDE BUT THE OPPOSITE DIRECTION OF the force of impact.

The answer is B, constant speed sideways, acceleration downwards.