A) \[mgR\]
B) \[\frac{mgR}{3}\]
C) \[\frac{mgR}{2}\]
D) \[\frac{mgR}{12}\]
E) \[\frac{mgR}{9}\]
Correct Answer: D
Solution :
Energy require = Final energy - initial energy \[=-\frac{GMm}{2(3R)}-\left[ \frac{GMm}{2(2R)} \right]\] \[=\frac{GMm}{2(3R)}-\left[ -\frac{1}{2}-\frac{1}{3} \right]\] \[=\frac{GMm}{12R}=\frac{g{{R}^{2}}m}{12R}\] \[=\frac{mgR}{12}\]You need to login to perform this action.
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