Gravitation Question 134
Question: The kinetic energy needed to project a body of mass m from the earth surface (radius R) to infinity is [AIEEE 2002]
Options:
A) mgR/2
B) 2 mgR
C) mgR
D) mgR/4
Show Answer
Answer:
Correct Answer: C
Solution:
$ [\frac{1}{2}mv_{e}^{2}=\frac{1}{2}m,,2gR=mgR] $