A) \[2\pi \,m{{s}^{-1}}\]
B) \[4\pi \,\,m{{s}^{-1}}\]
C) \[2\,m{{s}^{-1}}\]
D) \[4\,\,m{{s}^{-1}}\]
E) \[5\pi \,\,m{{s}^{-1}}\]
Correct Answer: A
Solution :
Velocity, \[v=r\omega =r\times \frac{\theta }{t}=\frac{r\times (\pi r/r)}{t}\] \[\therefore \] \[v=\frac{r\pi }{t}=\frac{10\times \pi }{5}=2\pi \,m{{s}^{-1}}\]
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