The force of gravity between two objects is given by:
[tex]F=G \frac{m_1 m_2}{r^2} [/tex]
where
G is the gravitational constant
m1 and m2 are the masses of the two objects
r is their separation
In this problem, the mass of the object is [tex]m_1=0.60 kg[/tex], while the Earth's mass is [tex]m_2=5.97 \cdot 10^{24} kg[/tex]. Their separation is [tex]r=1.3 \cdot 10^7 m[/tex], therefore the gravitational force exerted on the object is
[tex]F=(6.67 \cdot 10^{-11}m^3 kg^{-1} s^{-2}) \frac{(0.60 kg)(5.97 \cdot 10^{24} kg)}{(1.3 \cdot 10^7 m)^2}=1.4 N [/tex]
