A bob of mass 0.25 kg is attached with a string of length `0.25 m`. The bob is rotated on a horizontal circle. The maximum tension that string can bear is `225 N`. Maximum possible value of angular velocity of bob (in rad/s) is :

Options

A. 9
B. 18
C. 30
D. 60

Answer

D

Explanation

`T cos theta = mg` …(1)
`T sin theta = m omega^(2) l sin theta` …(2)
`omega = sqrt((T)/(ml)`