A) 0.1
B) 0.7
C) 5
D) 10
Correct Answer: B
Solution :
Since, the centripetal force is supplied by the frictional force, therefore \[umg=\frac{m{{v}^{2}}}{r}=mr{{w}^{2}}\] \[\Rightarrow \] \[{{u}_{g}}=r{{\omega }^{2}}\] \[\Rightarrow \] \[0.5\times 9.8=10\times {{\omega }^{2}}\] \[\Rightarrow \] \[\omega =\mathbf{0}\mathbf{.7}\,\,\mathbf{rad/sec}\]
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