{"type":"rich","version":"1.0","title":"Gravitational potential energy and gravitational potential","html":"<span class=\"wb-embed wb-embed-math\" data-latex=\"U(\\mathbf{r})=\\Phi(\\mathbf{r})m_1\">U(\\mathbf{r})=\\Phi(\\mathbf{r})m_1</span><footer><cite class=\"wb-embed-author\">Rong Martin-Siebler ZHOU</cite></footer>","width":640,"height":320}