Chapter 2, Problem 1PC

Calculate Emily’s average walking speed when she covers $1\text{meter}$ in $0.5\text{second}$.

To determine

The average walking speed of Emily.

Answer to Problem 1PC

The average walking speed of Emily is $s=2\text{m}/\text{s}$

Explanation of Solution

Given information: Total distance covered is 1m and total time taken is $0.5\text{s}$

Write the expression for average speed.

$s=\frac{d}{t}$

Here,

$d$ is the total distance covered.

$t$ is the total time taken.

Substitute 1 m for $d$ and 0.5 s for $t$ in the above expression to get $s$.

$\begin{array}{c}s=\frac{1\text{m}}{0.5\text{s}}\\ s=2\text{m}/\text{s}\end{array}$

Thus, the average walking speed is $s=2\text{m}/\text{s}$

Conclusion:

Therefore, the average walking speed of Emily is $s=2\text{m}/\text{s}$