Question

let a point A of mass M be fixed & \(p_0\) a point , let a panticle B of mass m be free in the space , A attracts B according to newtons law of gravitation ,
the magnitude \(g_1\)gravitation for portials to
\(\frac{1}{r^2}\), where r is the distance between A&B ,Force=F
\(|F|=\frac{c}{r^2}\)
show that
\(F=|F|(\frac{-1}{r}r')=frac{-c}{r^3}r'\)
were \(r'=[x-x_0,y-y_0,z-z_0]\)
\(p=(x,y,z)\)
\(p_0=(x_0,y_0,z_0)\)