A) \[\frac{mgR}{2}\]
B) \[2mgR\]
C) \[mgR\]
D) \[\frac{mgR}{4}\]
Correct Answer: C
Solution :
The minimum kinetic energy required to project a body of mass m from earth's surface to infinity is known as escape energy. Therefore, \[KE=\frac{G{{M}_{e}}m}{R}\,=mgR\] \[\left( \because gR=\frac{G{{M}_{e}}}{R} \right)\]
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