What is its average speed?
A) \[1.5\,m\,{{s}^{-1}}\]
B) \[3\,cm\,{{s}^{-1}}\]
C) \[1\text{ }cm\text{ }{{s}^{-1}}\]
D) \[~4.5\text{ }cm\text{ }{{s}^{-1}}\]
Correct Answer: C
Solution :
\[\text{Average}\,\text{speed}\,\text{=}\,\frac{\text{Total}\,\text{distance}}{\text{Total}\,\text{time}\,\text{taken}}\] \[=\frac{7cm}{7s}=1\,cm\,{{s}^{-1}}\]
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