This is a project. It is only a project.

Math 2 Unit 1 Project: Full stop ahead
Isabelle comisford

Activity One

Assume you are traveling on a dry road and have an average reaction

time. The formula d = 0.044s2 + 1.1s gives you a safe stopping distance d in feet,

where s is your speed in mi/h. Make a table of values for speeds of 10, 20, 30, 40,

50, and 60 mi/h. Then, graph the function.

Table of distance and speed coordinates. Graph below

Activity 2

Suppose a car left a skid mark d feet long. The formulas will estimate the speed (s) in miles per hour at which the car was traveling when the brakes were applied.

*~Use the formulas to complete the table. Round to the nearest mile per hour.

*~Why do you think the estimates of speed do not double when the skid marks double in length? Based on these results, what conclusions can you make about safe distances between cars?

Activity 3

Suppose you are driving on a dry road with 150 ft (about 10 car lengths) between your car and the car in front of you. Use the formula from Activity 1 to find the maximum speed you should be traveling in order to leave a safe stopping distance.

Answer is the speed of 47mph.

Activity 4

My video is on the bottom!

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