At a certain point between earth and the moon, the net gravitational force exerted on an object by earth and the moon is zero. the earth-moon centre-to-centre seperation is 3.84 x 10^5 km. the mass of the moon is 1.2% the mass of earth . a) where is this point located? are there any other such points? . b) what is the physical meaning of the root of the quadratic equation whose value exceeds the earth-moon distance?