# Full Stop Ahead

### by Meredith Pilgreen

## Activity 1:

For activity one you plug in x or the speed in miles per hour into the equation d=0.044s^2+1.1s wherever the s's are. Then you will get your y or distance after you solve the equation. This is my table below plugging in my x's into the equation and then getting my y's out of it.

Then I graphed the function after getting ordered pairs.

## Activity 2:

I don't think the skid marks would double in miles per hour because of length because it just varies on if the road was dry or if the road was wet and when you are going faster it just means the distance of the skid mark would go further because of how fast you were going it would take more to make the car stop. But just because the longer the skid mark is doesn't mean that it was going twice the speed because there is a certain formula that applies. This makes me come to the conclusion that cars need a good distance ahead of time to start breaking and taking off of the gas ahead of time. Also it concludes me that when it is raining and the road is wet you should go under the speed limit.

## Activity 3:

If you are on a dry road and you are 150 feet away from the person in front of you and you want a safe stopping distance then you will need to plug in 150 in for d for the formula in activity 1. So I plug in d and if I go 47 mph I will have a distance of 148 feet and that is better than going 48 mph because then you will be going over what the safe distance is so you will be going faster and having less distance than 151. So by being safe and rounding to whats closer to 150 it would be 47 so at lest you know you will have good safe stoping distance. By using the formula from activity 1 and plugging in speeds you can see how I got 47 by rounding and why it would make most sense.