Answer:
Force of gravity, F = 0.74 N
Mass of an object, m = 1.2 kg
Distance above earth's surface, [tex]d=1.9\times 10^7\ m[/tex]
Mass of Earth, [tex]M=5.97\times 10^{24}\ kg[/tex]
Radius of Earth, [tex]r=6.37\times 10^6\ m[/tex]
We need to find the force of gravity above the surface of Earth. It is given by :
[tex]F=G\dfrac{mM}{R^2}[/tex]
R = r + d
R = 25370000 m
[tex]F=6.67\times 10^{-11}\times \dfrac{5.97\times 10^{24}\ kg\times 1.2\ kg}{(25370000\ m)^2}[/tex]
F = 0.74 N
So, the force of gravity on the object is 0.74 N. Hence, this is the required solution.
