from the archives,
Common! Thats basic physics! The velocity of the feather or hammer is NOT weight dependent!m*g*h = 1/2*m*v^2g*h = 1/2*v^2v = sqrt(2gh)The reason why a feather falls down at lower speed on earth is because of the aerodynamic resistance. But there is no atmosphere on the moon. Same old school experiment: Compare the velocity of a penny and a feather in vacuum.