The gravitational force 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 the separation between the two objects
In this problem, [tex]m_1 = 175 kg[/tex], [tex]m_2 =15 kg[/tex] and [tex]r=2 m[/tex], therefore the gravitational force between the two objects is
[tex]F=(6.67 \cdot 10^{-11} m^3 kg^{-1} s^{-2}) \frac{(175 kg)(15 kg)}{(2m)^2}=4.38 \cdot10^{-8} N [/tex]
