Question

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

(2)$8 \times 10 ^ { 6 }$ (2)$6.4 \times 10 ^ { 14 }$

• A. $8 \times 10 ^ { 6 }$
• A. $2.4 \times 10 ^ { 3 }$
• B. $4.8 \times 10 ^ { 7 }$
• C. $6.4 \times 10 ^ { 14 }$

Answer 1

Answer: (B)

$4.8 \times 10 ^ { 7 }$

Answer 2

Gravitational intensity at point P, $I = \frac { G M } { r ^ { 2 } }$ and

gravitational potential $V = - \frac { G M } { r }$

$\therefore$ $= 6 \mathrm {~N} / \mathrm { kg } \times 8000 \mathrm {~km}$ .