Chapter 12: Full Stop Ahead Project

By Malik Bryant & Jahkele Goins

Activity 1

In Activity 1, The formula d = 0.044s^2+1.1s is used, to make a graph, to reduce the likelihood of an accident when driving. It gives you a safe stopping distance D in feet, where S is your speed in mi/h. As shown in the table, we used 10,20,30,40,50, and 60. For 10, the distance is 15.4 mi/h. 20 - 39.6 mi/h, 30 - 72.6 mi/h, 40 - 114.4 mi/h, 50 - 165 mi/h, and 60 - 224.4 mi/h. In the graph of the function, the y is the speed, and the x is the distance.

  

Activity 2

In Activity 2, you will have to estimate the speed S in miles per hour at which the car was traveling when the brakes were applied on dry and wet roads. On dry road, the 60 ft skid mark length speed is 40 mi/h. On wet road, it is 28 mi/h. On dry road, the 60 ft skid mark length speed is 57 mi/h. On wet road it is 40 mi/h. The reason the estimates of speed do not double when the skid marks double in length, because the dry road would probably not effect the speed of the car. The wet road would maybe make the car slide, so it will change the speed. My conclusions are that you would probably have to slow down, also it would take longer to stop or adjust in wet weather. Also, to be more alert when driving in wet or slippery conditions.

Activity 3

In Activity 3, say you are driving on a dry road with 150 ft (about 10 car lengths) between your car and the car in front of you and you have to use the formula from Activity 1. On Dry Road, 60 ft, it would be approximately 40 mi/h. On Wet Road, 60 ft, it would be approximately 28 mi/h. On Dry Road, 120 ft., it would be approximately 57 mi/h. On Wet Road, 120 ft, it would be approximately 40 mi/h.

Activity 4