College

The table below shows the data for a car stopping on a wet road. What is the approximate stopping distance for a car traveling 35 mph?

**Car Stopping Distances**

[tex]
\[
\begin{array}{|c|c|}
\hline
v & d(v) \\
(\text{mph}) & (\text{ft}) \\
\hline
\end{array}
\]
[/tex]

[tex]
\[
d(v) = \frac{2.15 v^2}{64.4 f}
\]
[/tex]

Options:
A. 41.7 ft
B. 49.7 ft
C. 97.4 ft

Answer :

To find the approximate stopping distance for a car traveling at 35 mph on a wet road, we use the formula given in the table:

[tex]\[ d(v) = \frac{2.15 \times v^2}{64.4} \][/tex]

Here's a step-by-step breakdown of how we calculate this:

1. Identify the velocity [tex]\( v \)[/tex] of the car, which is 35 mph in this scenario.

2. Plug the velocity into the formula:
[tex]\[ d(35) = \frac{2.15 \times 35^2}{64.4} \][/tex]

3. Calculate [tex]\( 35^2 \)[/tex]:
[tex]\[ 35^2 = 1225 \][/tex]

4. Multiply by the factor 2.15:
[tex]\[ 2.15 \times 1225 = 2637.5 \][/tex]

5. Divide by 64.4 to get the stopping distance:
[tex]\[ \frac{2637.5}{64.4} \approx 40.90 \][/tex]

Therefore, the approximate stopping distance for a car traveling at 35 mph on a wet road is about 40.9 feet.