A) \[16\,ml\]
B) \[6\,ml\]
C) \[5\,ml\]
D) \[3\,ml\]
Correct Answer: A
Solution :
\[T\sin \theta =\frac{m{{v}^{2}}}{r}\] \[T\cos \theta =mg\] \[v=r\omega \]and \[\sin \theta =\frac{r}{l}\] Putting these values in Eq (i), we get \[T\times \frac{r}{l}=m{{\omega }^{2}}r\] \[T=m{{\omega }^{2}}l\] \[\omega =2\pi n\] \[T=m{{(2\pi n)}^{2}}l\] \[T=m{{\left( 2\pi \times \frac{2}{\pi } \right)}^{2}}l\] \[T=16\,ml\]You need to login to perform this action.
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