Dlí dobhriste nádúir is ea an imtharraingt nó domhantarraingthe . Déileálann sé leis an luasghéarú chuig a chéile idir dhá rud, ar bhonn an fhad eatarthu.
Dlí imtharraingthe Newton :
F = G ⋅ m 1 ⋅ m 2 r 2 {\displaystyle F=G\cdot {\frac {m_{1}\cdot m_{2}}{r^{2}}}} San gcás seo, G = tairiseach na himtharraingthe:
G = 6.6742 ⋅ 10 − 11 N ⋅ m 2 k g 2 {\displaystyle G=6.6742\cdot 10^{-11}{\frac {\mathrm {N} \cdot \mathrm {m} ^{2}}{\mathrm {kg} ^{2}}}} Titim an chasúir agus an chleite: an spásaire David Scott (ón mhisean Apollo 15) ar an Ghealach , ag athléiriú finscéil thurgnamh domhantarraingthe Galileo . (1.38 MB, ogg/Theora format).