Question

What is the average velocity during time interval $t=2\text{s}$ to $t=5\text{s}$, in the following position time curve?

• A. $2\text{m/s}$
• B. $\frac{2}{3}\text{m/s}$
• C. $1.2\text{m/s}$
• D. $0.4\text{m/s}$

Answer 1

The correct option is B $\frac{2}{3}\text{m/s}$

Average velocity can be calculated from a position-time graph as change in position divided by the corresponding change in time.
Average velocity for the time interval $(t=2s\text{to}t=5s)$ is

$=\frac{\Delta x}{\Delta t}=\frac{6-4}{5-2}=\frac{2}{3}\text{m/s}$