A) \[mgl\,\sin \,\theta \]
B) \[mgl(1+\,\sin \,\theta )\]
C) \[mgl(1+\,\cos \,\theta )\]
D) \[mgl(1-\,\cos \,\theta )\]
Correct Answer: D
Solution :
\[h=l-I\cos \theta =l(1-\cos \theta )\] From law of conservation of momentum \[\frac{1}{2}m{{\upsilon }^{2}}=mgh=mgl\,(1-\cos \theta )\]You need to login to perform this action.
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