mg=F,得到g=F/m;(1)
再由mg=GMm/R^2(M为月球质量),得到g=GM/R^2;(2)
还有mg=GMm/R^2=m*4π^2*R/T^2,得到g=4π^2*R/T^2=F/m,推出R=4π^2*m/(T^2*F)(3)
将3式代入2式,得到M=16mπ^4/(FG*T^4)
mg=F,得到g=F/m;(1)
再由mg=GMm/R^2(M为月球质量),得到g=GM/R^2;(2)
还有mg=GMm/R^2=m*4π^2*R/T^2,得到g=4π^2*R/T^2=F/m,推出R=4π^2*m/(T^2*F)(3)
将3式代入2式,得到M=16mπ^4/(FG*T^4)