{"type":"rich","version":"1.0","title":"Gravitational potential energy between two point masses","html":"<span class=\"wb-embed wb-embed-math\" data-latex=\"U=-G\\frac{Mm}{r}\">U=-G\\frac{Mm}{r}</span><footer><cite class=\"wb-embed-author\">Rong Martin-Siebler ZHOU</cite></footer>","width":640,"height":320}