A) \[\frac{MgL}{72}\]
B) \[\frac{MgL}{18}\]
C) \[\frac{MgL}{6}\]
D) MgL
Correct Answer: A
Solution :
Weight of chain to be lifted \[=\,\,\,\frac{Mg}{6}\] Height through which centre of gravity is raised \[=\,\,\,\frac{L}{12}\] \[\therefore \,\,\,Work\,\,done\,\,=\,\,\frac{Mg}{6}\times \frac{L}{12}=\,\,\frac{MgL}{72}\]You need to login to perform this action.
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