Hi there!
For this situation, we can use the following equation for gravitational force:
[tex]F_g = \frac{Gm_1m_2}{r^2}[/tex]
Where:
G = Gravitational Constant (6.67 × 10⁻¹¹)
m₁ = Tom's mass (kg)
m₂ = Sally's mass (kg)
r = radius (m)
Plug in the given values:
[tex]F_g = \frac{(6.67*10^{-11})(75)(47)}{20^2} = \large\boxed{5.878 * 10^{-10} N}[/tex]
