A) \[\frac{2}{3}mgR\]
B) \[\frac{3}{4}mgR\]
C) \[\frac{mgR}{2}\]
D) \[\frac{mgR}{4}\]
Correct Answer: B
Solution :
\[\Delta U=\frac{mgh}{1+\frac{h}{R}}=\frac{mg\times 3R}{1+\frac{3R}{R}}=\frac{3}{4}mgR\]You need to login to perform this action.
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