A) mgR/2
B) 2mgR
C) mgR
D) -mgR
Correct Answer: A
Solution :
\[{{U}_{g}}=-\frac{G{{M}_{1}}{{M}_{2}}}{R}\] \[\Rightarrow \]\[{{U}_{f}}-{{U}_{i}}=-\frac{GMm}{2R}-\left( -\frac{GMm}{R} \right)\] \[\Delta U=\frac{GMm}{2R}=\frac{mgR}{2}\left\{ g=\frac{GM}{{{R}^{2}}} \right\}\]You need to login to perform this action.
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