\(F_{hapdan}=G\dfrac{m'm''}{r^2}=6,67\cdot10^{-11}\dfrac{6\cdot10^{24}\cdot7,2\cdot10^{22}}{\left(3,8\cdot10^5\cdot1000\right)^2}=.......\left(N\right)\)
\(F=G\cdot\dfrac{M_1M_2}{d^2}=6,67\cdot10^{-11}\cdot\dfrac{6\cdot10^{24}\cdot7,2\cdot10^{22}}{\left(3,8\cdot10^5\cdot10^3\right)^2}=2\cdot10^{20}\)(N)
Chọn C