Final answer:
A fully loaded tractor trailer requires up to 4 times the stopping distance of a car due to greater momentum, brake system differences, and load factors.
The correct answer is option D) 4 times.
Step-by-step explanation:
The question is asking for the comparison between the stopping distances for a fully loaded tractor trailer and a car at a specific speed. To determine this, one would need to consider factors such as driver reaction time, the mass of the vehicle, brake efficiency, and road conditions.
However, typically a fully loaded tractor trailer will require more distance to stop compared to a car, because the greater mass of the trailer means it has more momentum, which requires more force to stop under the same conditions.
In general physics and practical driving experience, it is often said that a fully loaded large truck or tractor trailer can require up to 4 times the distance of a car to stop due to this increased momentum and other factors affecting braking such as brake lag, longer distance for air brakes to engage, and the load being carried.
The correct answer is option D) 4 times.