Chapter 2.3, Problem 16PP

To determine

The position of the runner A at $t=0\text{s}$ .

Answer to Problem 16PP

The position of the runner A is $x=0\text{m}$ at $t=0\text{s}$ .

Explanation of Solution

Introduction:

The slope of the position-time graph gives the velocities of the runner A and runner B. The position of the every runner at certain time is point at the position axis of the graph for the corresponding value of the time.

The position-time graph for the runner A and runner B is given in the below figure.

The vertical axis shows the position and horizontal axis shows the time for that corresponding position. The position of the runner A in the graph is at $x=0\text{m}$ for the corresponding time $t=0\text{s}$ .

Conclusion:

Thus, the runner A is at the origin of the position-time graph at time $t=0$ .