Question

Find the intensity of gravitational field when a force of
74 N acts on a body of mass 3.7 kg in the gravitational
field.
Ans. 20 N kg-7
The gravitational field intensity at a point 10000 km
from the centre of the earth is 4.8 N kg Calculate
the gravitational potential at that point.
Ans. -4.8 x 107 J kg -1
-1
.​

Answer 1

Explanation:

Gravitational field intensity, E= GM/R²

Gravitational potential, V= GM/R

∴V/R = − R

Given data

Center of the earth E=4.8Nkg-¹

−E=−4.8Kg-¹

Gravitaional field intensity R=10,000Km

or V=−ER=−4.8×10,000×10³

= −4.8×10⁷J Kg-¹