Task 3
The formula d = 0.044s2 + 1.1s relates the maximum speed s in mph that you should travel in order to be able to stop in d feet.
Suppose you have 150 feet (about 10 car lengths) between your car and the car in front of you. Find the maximum speed you should travel to avoid a collision.
d = 044s2+1.1s
150 = 0.044s2 + 1.1s
0.044s2 +1.1s – 150 = 0
Solve by this way: S = -b ± √ b2 – 4ac
Or by finding delta d
S1= 47.2 S2=-72.2
We will take the positive number which is equal to 47.2 .. the negative number is rejected.
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