Chapter 8, Problem PFA

To determine

The speed of car in feet per second .

Answer to Problem PFA

  $88\text{feet per second}$

Explanation of Solution

Given information:

A car is travelling at 60 miles per hour.

Calculation:

In order to find the speed of a car in feet per second, first convert miles per hour to feet per hour by multiplying 5280ft because 1 mile is equal to 5280ft and then convert feet per hour to feet per second by multiplying 1hr/3600sec to simplify further as shown below:

  $\begin{array}{l}60\text{mph}\\ \text{60}\times \text{5280}=316800\text{feet per hour}\\ \text{316800×}\frac{\text{1}}{\text{3600}}=\text{88feet}\text{per}\text{sec}\end{array}$

Thus, the speed of car in feet per sec is $\text{88fps}$ .