Gravitational force Fg = Gm1m2r2\;\frac{Gm_1m_2}{r^2}r2Gm1m2
Fg = 10N
distance = r2\;\frac{r}{2}2r
F'g = Gm1m2( r2)2\;\frac{Gm_1m_2}{\left(\;\frac{r}{2}\right)^2}(2r)2Gm1m2 = 4 ( Gm1m2r2\;\frac{Gm_1m_2}{r^2}r2Gm1m2) = 4Fg = 4 x 10 = 40N
