A) \[\frac{\omega (m+2M)}{m}\]
B) \[\frac{\omega (m-2M)}{(m-2M)}\]
C) \[\frac{\omega m}{(m+M)}\]
D) \[\frac{\omega m}{(m+2M)}\]
Correct Answer: D
Solution :
As external torque is acting about the axis, angular momentum of system remains conserved. \[\therefore \] \[{{l}_{1}}\omega ={{l}_{2}}\omega '\] \[\Rightarrow \]\[m{{R}^{2}}\omega =(m{{R}^{2}}+2M{{R}^{2}})\omega '\] \[\Rightarrow \]\[\omega '=\left( \frac{m}{m+2M} \right)\omega \]You need to login to perform this action.
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