Unit 1 Project "Full Stop Ahead"
Due: Friday, April 17
a. Why do you think the estimates of speed do not double when the skid marks double in length?
- Someone's personal reaction time and the conditions of the road/weather will determine how long the skid marks will be as you slam on breaks/try to stop however. If it is wet outside, the skid marks will be longer because the roads are slippery making it much more difficult for a person to stop abruptly rather than dry roads, which would obviously have shorter skid marks.
b. Based on the results, what conclusions can you make about safe distances between cars?
- Since safe distances between cars varies on your speed and road conditions, it would be more responsible and safe to make sure you have enough time to slow down and that you slow down at such a good time that you have space between you and the car that is stopped in front of you. Also, when driving behind a car, you never want to drive too close, especially when it is raining, because slippery road conditions can cause you to skid across the road with a strong chance of hitting the car or object in front of you.
Use the formula from Activity One and a traveling distance of 150 feet on dry road to find the max. speed you should travel in order to leave a safe stopping distance:
To be able to leave a safe stopping distance on dry road under normal reaction times (of a person), you should drive at the maximum speed of about 59 mph. The maximum speed cannot be negative number because in a real scenario, it is impossible to go at a negative speed, unless you're going 0 mph, which obviously means that you are not moving at all.