A) \[30\,rad{{s}^{-1}}\]
B) \[20\,rad{{s}^{-1}}\]
C) \[10\,rad{{s}^{-1}}\]
D) \[25\,rad{{s}^{-1}}\]
E) \[40\,rad{{s}^{-1}}\]
Correct Answer: A
Solution :
The tension\[T=mr{{\omega }^{2}}\] \[{{\omega }^{2}}=\frac{T}{mr}=\frac{900}{2\times 0.5}\] \[{{\omega }^{2}}=900\] \[\omega =30\,rad/s\]
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