Fhd=Fht
\(\Rightarrow\frac{GMm}{\left(R+h\right)^2}=\frac{mv^2}{R+h}\)
\(\Rightarrow v=\sqrt{\frac{GM}{2R}}\)
\(\Rightarrow\omega=\sqrt{\frac{GM}{\left(R+h\right)^3}}\)
Mà T=\(\frac{2\pi}{\omega}\)
\(\Rightarrow T=\frac{2\pi}{\sqrt{\frac{GM}{\left(R+h\right)^3}}}\)