A) \[2mgR\]
B) \[mgR\]
C) \[\frac{2}{3}mgR\]
D) \[\frac{3}{2}mgR\]
E) \[\frac{1}{3}mgR\]
Correct Answer: C
Solution :
Work done \[W=\Delta U=\frac{mgh}{1+\frac{h}{R}}\] Substituting\[h=2R,\]we get \[\Delta U=\frac{mg2R}{1+2}\] \[\Delta U=\frac{2mgR}{3}\]You need to login to perform this action.
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