Mars has a moon (Phobos) with an orbital period of 7.67 hours and an orbital radius of
9.4x106 m. Use Kepler’s 3rdLaw to estimate the mass of Mars.
4pi^2/T^2 = {G M}/{R^3}
solve for Mass M.
4PI^2*R^3/T^2 * 1/G = Mass
9.4x106 m. Use Kepler’s 3rdLaw to estimate the mass of Mars.
solve for Mass M.
4PI^2*R^3/T^2 * 1/G = Mass