Gravitation Question 113
Question: A body of mass m is taken from earth surface to the height h equal to radius of earth, the increase in potential energy will be [NCERT 1971; CPMT 1971, 97; IIT 1983; CBSE PMT 1991; Kurukshetra CEE 1996;CMEET Bihar 1995; MNR 1998; AIEEE 2004]
Options:
A) mgR
B) $ [\frac{1}{2}mgR] $
C) 2 mgR
D)$ [\frac{1}{4}mgR] $
Show Answer
Answer:
Correct Answer: B
Solution:
$ [\Delta U=\frac{mgh}{1+\frac{h}{R}}=\frac{1}{2}mgR,,(\because ,,,h=R)] $
