A) \[\frac{mgR}{2}\]
B) \[mgR\]
C) \[2mgR\]
D) \[\frac{mgR}{4}\]
Correct Answer: A
Solution :
At surface of earth RE. \[U=-\frac{GMm}{R}-mgR\] At a height \[R,U=\frac{-mgR}{2}\] Change \[=-\frac{mgR}{2}-(-mgR)=\frac{mgR}{2}\]You need to login to perform this action.
You will be redirected in
3 sec