Question

If a runner accelerates from 2 m/s to 3 m/s in 4 s, her average acceleration is _____.

Answer 1

`\begin{gathered} v1=2\text{ m/s} \\ v2=3\text{ m/s} \\ t=4s \\ a=\text{?} \\ a=(v2-v1)/(t)=\frac{3\text{ m/s}-2\text{ m/s}}{4s}=\frac{1\text{ m/s}}{4s}=0.25m/s^2 \\ \text{The average acceleration is }0.25m/s^2 \end{gathered}`