At what height from the surface of earth the gravitation potential and the value of g are -5.4 107 J kg-2 and 6.0ms-2 respectively? Take the radius of earth as 6400 km:
2600 km
1600 km
1400 km
2000 km
Potential due to Uniform solid sphere -
Radius of sphere
Mass of sphere
distance from centre of sphere
- wherein
Outside the surface
on the surface
Inside the surface
Gravitational potential at a height
acceleration due to gravity at the height =
or
or
or
or
Option 1)
2600 km
This option is correct.
Option 2)
1600 km
This option is incorrect.
Option 3)
1400 km
This option is incorrect.
Option 4)
2000 km
This option is incorrect.