A) \[\frac{MgL}{{{n}^{2}}}\]
B) \[\frac{MgL}{2{{n}^{2}}}\]
C) \[\frac{2MgL}{{{n}^{2}}}\]
D) \[nMgL\]
Correct Answer: B
Solution :
Mass of the hanging part \[=\frac{M}{n}\] \[{{h}_{COM}}=\frac{L}{2n}\] work done \[W=mg{{h}_{COM}}=\left( \frac{M}{n} \right)g\left( \frac{L}{2n} \right)=\frac{MgL}{2{{n}^{2}}}\] Option [b]You need to login to perform this action.
You will be redirected in
3 sec