Question

At what height from the surface of earth the acc due to gravity is the same at a dept 160km below the surface of earth radius of earth 6.4 10 m
$10 ^{2}$

$\times$
​

Answer 1

Answer:

g at depth=g at height

g(1−

R

d

)=g(1−

R

2h

)

⟹h=

2

d

=80km

Answer 2

Answer:

g at depth=g at height

g(1− Rd)

=g(1− R2h)

⟹h= 2d

=80km