{"type":"rich","version":"1.0","title":"Circular orbital speed from the enclosed mass","html":"<span class=\"wb-embed wb-embed-math\" data-latex=\"v_c(r) = \\sqrt{\\frac{G M(r)}{r}}\">v_c(r) = \\sqrt{\\frac{G M(r)}{r}}</span>","width":640,"height":320}