Question #484de
1 Answer
If we rely on the posted correct answer, depth should be
Explanation:
Calculate gravitational force between body and mass of part sphere of earth which lies below 320 km. Force due to outer spherical shell tends to cancel out.
Mass of earth
where
mass of earth sphere below
Acceleration due to gravity at the location of body
Inserting value from (1) we get
We know that acceleration due to gravity at the surface in terms of equation (2)
Dividing (2) by (3) we get
Taking average radius of earth as
Weight of