The intensity of gravitational field at a point situated at a distance of 8000 km from the centre of the earth is 6N / kg. The gravitational potential at that point is – (in Joule / kg) :

2.4 x 103 8 x 106 4.8 x 107 6.4 x 1014

4.8 x 107

Gravitational intensity at point P, l = GM/r2 and gravitational potential v = -GM/r  \(\Rightarrow V = I r\) \(\Rightarrow V = 6*8000 \) V = 4.8 x 107 J/kg