Question

6. Which of the following describes a speed of 8 meters per second? * 100 meters in 8 seconds O 80 meters in 8 seconds O 8 meters in 8 seconds O 80 meters in 10 seconds

Answer 1

8 meters per seconds simply implies covering a distance of 8 meters in 1 seconds. The situation describes speed. Therefore,

$\begin{gathered} \text{speed}=\frac{dis\tan ce}{\text{time}} \\ \text{speed}=\frac{8}{1}=8ms^{-1} \end{gathered}$

We will look for similar one in the options

$\text{speed}=\frac{80}{10}=\frac{8}{1}=8ms^{-1}$

The answer is 80 meters in 10 seconds.