Final answer:
When stopping a vehicle behind another vehicle on a hill, the distance at which you should stop depends on factors such as the grade or steepness of the hill, your reaction time, and the total stopping distance. It is recommended to stop your vehicle at a distance of approximately one car length for every 10 miles per hour of speed, taking into account the grade of the hill. However, it is important to note that these recommendations are approximate and may vary depending on the specific circumstances.
Step-by-step explanation:
When stopping a vehicle behind another vehicle on a hill, the distance at which you should stop depends on a few factors. One important factor is the grade or steepness of the hill. If the hill is steep, you should stop your vehicle at a greater distance to ensure that you have enough space to start moving again without rolling back into the vehicle behind you. Another factor is your reaction time, which is the time it takes for you to perceive a need to stop and actually apply the brakes. The total stopping distance is the sum of the distance traveled during your reaction time and the distance it takes for the car to come to a complete stop.
For example, let's say you are driving on a steep hill with a grade of 10%. The recommended stopping distance behind another vehicle on a hill with a grade of 10% is approximately one car length for every 10 miles per hour of speed. So, if you are driving at 30 miles per hour, you should stop your vehicle about three car lengths behind the vehicle in front of you. This allows you enough space to safely start moving again without rolling back into the vehicle behind you.
It is important to note that these recommendations are approximate and may vary depending on the specific circumstances. The grade of the hill, the condition of the road, and the weight of your vehicle are all factors that can affect the stopping distance. It is always best to exercise caution and use your judgment when stopping your vehicle behind another vehicle on a hill.