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source: "Derivation of Gravitational Potential Energy" by Rhett Allain
<?xml version="1.0" encoding="UTF-8"?> <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="v=0" display="block"> <apply> <eq/> <ci>v</ci> <cn type="integer">0</cn> </apply> </math>
<?xml version="1.0" encoding="UTF-8"?> <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="\vec{F}=\frac{-Gm_{1}m_{2}}{x^{2}}\hat{x}" display="block"> <apply> <eq/> <apply> <ci>→</ci> <ci>𝐹</ci> </apply> <apply> <times/> <apply> <divide/> <apply> <minus/> <apply> <times/> <ci>𝐺</ci> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">1</cn> </apply> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">2</cn> </apply> </apply> </apply> <apply> <csymbol cd="ambiguous">superscript</csymbol> <ci>𝑥</ci> <cn type="integer">2</cn> </apply> </apply> <apply> <ci>^</ci> <ci>𝑥</ci> </apply> </apply> </apply> </math>
<?xml version="1.0" encoding="UTF-8"?> <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="W=\int_{\infty}^{r}\frac{-Gm_{1}m_{2}}{x^{2}}dx" display="block"> <apply> <eq/> <ci>𝑊</ci> <apply> <apply> <csymbol cd="ambiguous">superscript</csymbol> <apply> <csymbol cd="ambiguous">subscript</csymbol> <int/> <infinity/> </apply> <ci>𝑟</ci> </apply> <apply> <times/> <apply> <divide/> <apply> <minus/> <apply> <times/> <ci>𝐺</ci> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">1</cn> </apply> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">2</cn> </apply> </apply> </apply> <apply> <csymbol cd="ambiguous">superscript</csymbol> <ci>𝑥</ci> <cn type="integer">2</cn> </apply> </apply> <apply> <csymbol cd="latexml">differential-d</csymbol> <ci>𝑥</ci> </apply> </apply> </apply> </apply> </math>
<?xml version="1.0" encoding="UTF-8"?> <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="W=-Gm_{1}m_{2}\int_{\infty}^{r}\frac{1}{x^{2}}dx" display="block"> <apply> <eq/> <ci>𝑊</ci> <apply> <minus/> <apply> <times/> <ci>𝐺</ci> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">1</cn> </apply> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">2</cn> </apply> <apply> <apply> <csymbol cd="ambiguous">superscript</csymbol> <apply> <csymbol cd="ambiguous">subscript</csymbol> <int/> <infinity/> </apply> <ci>𝑟</ci> </apply> <apply> <times/> <apply> <divide/> <cn type="integer">1</cn> <apply> <csymbol cd="ambiguous">superscript</csymbol> <ci>𝑥</ci> <cn type="integer">2</cn> </apply> </apply> <apply> <csymbol cd="latexml">differential-d</csymbol> <ci>𝑥</ci> </apply> </apply> </apply> </apply> </apply> </apply> </math>
<?xml version="1.0" encoding="UTF-8"?> <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="W=\frac{Gm_{1}m_{2}}{r}" display="block"> <apply> <eq/> <ci>𝑊</ci> <apply> <divide/> <apply> <times/> <ci>𝐺</ci> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">1</cn> </apply> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">2</cn> </apply> </apply> <ci>𝑟</ci> </apply> </apply> </math>
<?xml version="1.0" encoding="UTF-8"?> <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="W=\Delta KE" display="block"> <apply> <eq/> <ci>𝑊</ci> <ci>ΔKE</ci> </apply> </math>
<?xml version="1.0" encoding="UTF-8"?> <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="W=\frac{1}{2}m_{1}v^{2}=\frac{Gm_{1}m_{2}}{r}" display="block"> <apply> <and/> <apply> <eq/> <ci>𝑊</ci> <apply> <times/> <apply> <divide/> <cn type="integer">1</cn> <cn type="integer">2</cn> </apply> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">1</cn> </apply> <apply> <csymbol cd="ambiguous">superscript</csymbol> <ci>𝑣</ci> <cn type="integer">2</cn> </apply> </apply> </apply> <apply> <eq/> <share href="#Ex1.m1.sh1"/> <apply> <divide/> <apply> <times/> <ci>𝐺</ci> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">1</cn> </apply> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">2</cn> </apply> </apply> <ci>𝑟</ci> </apply> </apply> </apply> </math>
<?xml version="1.0" encoding="UTF-8"?> <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="v=\sqrt{\frac{2Gm_{2}}{r}}" display="block"> <apply> <eq/> <ci>𝑣</ci> <apply> <root/> <apply> <divide/> <apply> <times/> <cn type="integer">2</cn> <ci>𝐺</ci> <apply> <csymbol cd="ambiguous">subscript</csymbol> <ci>𝑚</ci> <cn type="integer">2</cn> </apply> </apply> <ci>𝑟</ci> </apply> </apply> </apply> </math>