MHTCET 2016 Physics Solved Paper

(a) The value of acceleration due to gravity g at a height h is given by
g′=g(

Re

Re+h

)2
Here, Re = radius of earth
g = acceleration due to gravity at earth surface.
g′=

g

4

and Rc=R
So,

g

4

=g(

R

R+h

)2

1

2

=

R

R+h

⇒ 2 R = R + h ⇒ R = h