{"type":"rich","version":"1.0","title":"Newton's 2nd law (vector notation)","html":"<span class=\"wb-embed wb-embed-math\" data-latex=\"\\sum\\overrightarrow{F_{ext}}=m\\overrightarrow{a}\">\\sum\\overrightarrow{F_{ext}}=m\\overrightarrow{a}</span><footer><cite class=\"wb-embed-author\">Rong Martin-Siebler ZHOU</cite></footer>","width":640,"height":320}