A) \[\frac{mg{{R}^{2}}}{l}\]
B) \[\frac{mg{{R}^{2}}}{l}\sin \,\left( \frac{l}{R} \right)\]
C) \[\frac{mg{{R}^{2}}}{l}\cos \,\left( \frac{l}{R} \right)\]
D) None of these
Correct Answer: B
Solution :
Here, \[\alpha =\frac{l}{R}\] Consider the element of the chain as shown in the figure below, its mass is, \[dm=\frac{m}{l}\times Rd\theta \].You need to login to perform this action.
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