Free-fall speed
= Free-fall speed
{title2=$v_{\rm ff}$}
The Newtonian free-fall speed from rest at infinity toward a point mass is $v_{\rm ff}=\sqrt{2GM/r}$.
= Free-fall speed
{title2=$v_{\rm ff}$}
The Newtonian free-fall speed from rest at infinity toward a point mass is $v_{\rm ff}=\sqrt{2GM/r}$.