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Problem 71

Acceleration At the instant the traffic light tur…

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Problem 70

Deceleration A car traveling at 45 miles per hour is brought to a stop, at constant deceleration, 132 feet from where the brakes are applied.

(a) How far has the car moved when its speed has been reduced to 30 miles per hour?
(b) How far has the car moved when its speed has been reduced to 15 miles per hour?
(c) Draw the real number line from 0 to $132 .$ Plot the points found in parts (a) and (b). What can you conclude?

Answer

$$
\begin{array}{l}{\text { (a) } 73.32 \mathrm{ft}} \\ {\text { (b) } 117.34 \mathrm{ft}} \\ {\text { (c)see solution for answer }}\end{array}
$$



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Video Transcript

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