At what height from the surface of earth the gravitational potential and the value of 
are 
and 
respectively? Take, the radius of earth as 6400 km. [NEET 2016]
Text Solution
Verified by ExpertsThe correct answer is:
D
Gravitational potential at some height 
from the surface of the earth is given by
… (i)
And acceleration due to gravity at some height 
from the earth surface can be given as
… (ii)
From Eqs. (i) and (ii), we get
Radius of earth, 
.
Substitute these values in Eq. (iii), we get
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