A) 1 Joule
B) \[1.5\] Joule
C) 3 Joule
D) 6 Joule
Correct Answer: C
Solution :
The mass of the rod is distributed all over its length. In such a situation, the entire mass can be considered to be concentrated at its\[C.G\]. Now in the given problem to calculate the increase in potential energy, we must calculate the change in height of the\[C.G\]. If in general, the length of the rod is\[l\], then the initial position of the \[C.G.\] is \[\frac{l}{2}\] from the top end, as shown in the figure below:You need to login to perform this action.
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